Print a coupon for $1 off and apply for a free sample. Basically, the product is photo paper with sticky backing, so you use your photo printer to print an image on it and then you can peel off the backing to reveal the 'sticky' surface.
http://www.3m.com/us/office/postit/digital/coupon.html
It’s all a snap with Post-it® Sticky Picture Paper. They stick just like Post-it® Super Sticky Notes but they’re printable. The special matte-finish paper works with both photo and inkjet printers – just like other photo papers – but with an adhesive backing. Just print, peel and stick!