I have a shirt Richard Petty signed would like to sell it do you know any body that buys stuff like that

There's a guy the sales cars and some sports stuff. He's in the second row of buildings. If you go where the office is, go past the office, the second row, he's the first person to the left on the left. Not sure if that's anything he'd buy but if wouldn't hurt to try.

I would try facebook marketplace or Ebay to sell that

No