Engraved Portraits of Gauss for sale by Acme Klein Bottle!
In 2002, our printer was pushed out of the Gauss Portrait Business by a giant European multinational conglomerate. Recently, we uncovered a special stash, which are now for sale.
HURRY  NO MORE ARE BEING MADE! OUR SUPPLY IS FINITE, NONZERO, AND COUNTABLE!
As a service to those who appreciate the joy of Gaussian Quadrature, Acme has imported a small number of quality portraits of this great mathematician. Now on sale, along with a FREE BONUS!
Seven year old Carl Frederich Gauss amazed his teachers instantly adding all the integers from 1 to 100. Fourteen years later, he made a regular 17gon by ruler and compass  the first advance in the field since the ancient Greeks. Then in 1801, he solved the orbit of the newlydiscovered asteroid Ceres, by inventing the method of leastsquares. In 1818, Gauss surveyed German locations into the Danish geodetic grid. He observed during the day, then calculated positions at night  astonishing surveyors with his skills. As director of Gottingen Observatory, he developed the fields of hypergeometric functions, potential theory, differential equations, conic sections, terrestrial magnetism, and celestial mechanics. And, of course, he developed the Gaussian Bell Curve, to account for the statistical variation in individual observations of stellar locations. There's hardly a branch of math untouched by Gauss.
In 2001, Acme Klein Bottle's entire staff and management visited Berlin, researching the Kleinsche Flasche. On returning, he discovered several copies of this picture in his pocket. Thanks to this foresight, you can own a picture of this illustrious polymath.
Your Gauss portrait comes on a rectangle of highquality paper, 13cm by 6.5 cm (5inches x 2.5 inches). It's reproduced using the rare multicolor intaglio process and printed on long lasting linen based paper  a generous 10 microns thick  using a secret process known only to special government agents. Guaranteed fadeproof ... perfect for framing!
And every portrait includes the following exclusive features:
Unlike your calculus textbook, each portrait of Gauss is guaranteed by the Deutsche Bundesbank, which uses Gaussian mathematical techniques in its business. With a short piece of tape, you can create a compact Möbius loop  an ideal complement to your Acme Klein Bottle.
While almost unknown to Americans, many Europeans have treasured these portraits. Yes, millions of citizens once carried these pictures  some had collections of five, ten, and even TWENTY portraits. Indeed, thousands of railway workers went on strike to demand portraits of Gauss!
These Portraits of Gauss have been owned by many Professors and Researchers at FAMOUS UNIVERSITIES! Often, mathematicians happily solved tough differential equations in exchange for a few of these pictures. Several Nobel Prize Winners have carried these around in their pockets. And even mathematical illiterates appreciate them as gifts.
Impress your friends  they'll be amazed when they see a real Gaussian DeutschMark! And you'll be ready for the upcoming collapse of the world economy!
Of course, we deliver much more than a portrait of Gauss! You'll also receive a diagram of Göttingen University, as it appeared over 150 years ago. Yes, this famous institution is reproduced right next to Carl Frederich himself  and it's architecturally more important than the Hubble Space Telescope. It was right here that Felix Klein invented the Klein Bottle in 1872. Look carefully and you may see many mathematicians peeking out of the windows of Göttingen, including Riemann, Bessel, Hilbert, Weber, Runge, Minkowski, Von Neumann, and even August Möbius. (David Hilbert's gravestone in Gottingen reads "Wir müssen wissen. Wir werden wissen."  "We must know. We will know.") And notice Gauss's fashionable headwear  similar to Acme's onesided Klein Bottle Hat!
FREE BONUS! Buy now, and we will include a free equation! This handy relationship lets you calculate the Normal Distribution without a computer. It'll work all the way from ∞<x<∞ ... quite a bit farther than you can bicycle.
But wait  there's more! As an extra bonus, we'll give you a FREE GRAPH of the normal distribution covering plus and minus Three Sigma! Perfect for statistics students and lazy census takers.
Interested in navigation? Well, on the back of Gauss's portrait, you'll find a diagram for a sextant to help find your place on earth. Make your own  this shows filters, adjustable mirrors, and a small telescope. Forget about those unreliable GPS receivers. Build one like this and never be lost! I've been told that this is a "Vizeheliotrop"  also called a Heliotrope; a device invented by Gauss with a mirror to reflect sunlight to an distant observer, to allow surveys across long distances. But, this doesn't look like a heliotrope, which has a large mirror. Rather, it appears to be "Sextant No. 420 by Edward Troughton". Troughton was an English instrument maker in the early 1800's. Apparently, this sextant is now at the First Physical Institute of University of Göttingen and has a handwritten inscription, "Property of Hofraths Gauss" (Another Troughton sextant #420 is found at Melbourne Museum, Australia) 

Included: a miniature geodetic survey section covering the important locations of Falkenberg, Wilsede, Hohenhorn, Hamburg, Bremen, Zeven, and Neuwerk. You'll never get lost in the German state of Niedersachsen: just reach for your portrait of Gauss, and there on the back, in miniature print, you'll find the perfect map. Ideal for spies, politicians, and tax collectors on the run. 
SPECIAL FEATURE! Next to every portrait of Gauss is a second portrait, invisible to most people. By means of a secret method which we will reveal to each purchaser, you can see a ghostlike mirror image of Gauss' portrait. Amaze your friends! YES, YOU GET TWO PORTRAITS FOR THE PRICE OF ONE! 
Although it would be much cheaper to make these ourselves, we have imported these portraits directly from a trusted manufacturer in an Important First World Country. But on Dec 31, 2001, the factory stopped printing them, so our supplies are very limited. NEVERAGAINAVAILABLE!
HAPPY NEWS! Acme Klein Bottle has authorized outlets around the world to exchange your Portrait of Gauss for five Euros and 11 EuroCents. What a deal! Click here for Oanda foreign exchange conversion information)
March 7, 2020: I now have about a dozen Gauss portraits. These are
crisp, *UNCIRCULATED* and without any fold marks. Only $45, postpaid 
yep, you heard me right  FREE SHIPPING ANYWHERE IN OUR UNIVERSE
THIS IS YOUR LAST CHANCE! NO MORE GAUSS PORTRAITS WILL EVER BE MADE! These rare portraits are treasured collectors items. In fact, a big European Government is already collecting them for its treasury. So ACT NOW  time is running out on this special offer!
July 1, 2002: According to a poll, 54 percent of Germans wish they had the DeutschMark in their pockets instead of the Euro (they call it the "teuro", a play on words which means "expensive"). Naturally, we at Acme Klein Bottle are perfectly happy to export DeutschMarks to Germany...