I really hope this was a bad typo. Only a truly stupid person would think that is worth that much.
Gronk stuff was so mass produced that you can still get a poster for less that $20. I know when he retired we saw some price gauging on his stuff, which means if you over paid to buy anything then, well, you over paid.
I get it though, football season is starting again and this guy figures he has the corner on the market. I have seen worse get rich quick schemes than this.