here is the deal,contact a member,a new one with 1 feedback on a trade,we text pics and info back and forth ,agree to a trade pending a meet .I asked when he wants to meet, he falls of the grid,then text me 16 days later to offer a different trade,i asked him what happened to the other ,he said he sold it,offers a third possible trade,he sends me pics .we exchange ideas on trade and adgee to meet the next day ,he disappears again will not return texts ,or calls , but still active on trader, should I post negative feedback?