Wired posted a story about Nissan postage stamps that are being sold in Japan between February 1st and August 31. If you are into Nissans and in Japan, you can pick some up.
Both sets are 80-yen stamps, 10 to a sheet. They’re sold by the sheet only and will cost you 1,200 yen per. You’ve gotta get ‘em in person. Mail order? Sorry, “Not available,” postal officials say.