Originally Posted by Artiodactyla
$30 is worth the risk. If it was $300, hell no.
One Problem here (one of many) is that it's a collectible store.
If its an even semi-competent manager/owner who thought the autographs might have a "reasonable" chance to be real, they would put in the $ to authenticate it.
If the underlying item has value on its own, I could see throwing away $10-20 to take a chance. But 999 times out of a thousand, it'll be fake