I used to be a manager at Petco and would put signs saying "Support Afghanistan & Pakistan" (Afghans and Paki's in general) on leopard gecko terrariums to piss people off:-)
I saw a garter at Petco with blueish green stripes last week. At least that was written on the sticker "garter snake" and it looked like a garter to me but that doesn't say much, being new to snakes.