No.
lady gaga is so awesome so I think her autographs sell really good.
no it is not illegal to sell drinks out of your car
No, it is not illegal for a creditor to sell your debt.
No, it is not illegal to sell a house for cash.
No, it is not illegal to sell gift cards.
it depends on who people like. dont just get autographs to sell them
Yes, it is illegal to sell legos coming from China.
It is illegal to sell dog hair in the state of California.
Yes, it is illegal to sell money as it is considered counterfeiting, which is a criminal offense.
You can sell autographed albums to record collectors. You can also sell them to fans of the person who autographed them. Another person who would be interested is one who collects autographs.
Try comparing it to the other autographs and find out the average price for the similar autographs, and probably put your price close to what the others are.
Is it illegal to sell sick puppies to the public at a pet store?