Vintage T-Shirt Forum & Community Authentication Appraisals

Hi! I just found this forum since I became aware that some artifacts in my closet are sought after and I'm entertaining selling them since they don't fit me anymore. I'm the original owner of all of these and I'm seeking feedback from people who know the market better than I do. I've done some recent "sold" searches on ebay for similar items in order to price them on Depop, but would like to know if some of the offers coming in are respectible.

Next is my FNM shirt

Great one, most recently sold for around $300.