Pawn Shop
A separate place like tc sellers can pawn their items to receive money temporary or their items are sold. I have tested this theory for some time. This system would require the pawner(person giving tc) to be verified, the items would be put into a set labeled ie [name] Loan Amount, then the person has a time limit to pay off that loan set by the pawner on his forum. There would be a post stating what the person is pawning and what amount they are receiving.
For instance, Haloyoung wanted a loan of 150k i told him give me items of value to hold onto into a set, He then sent me items currently worth 170k+. He pays back his loan and recieves his items back. Same for ninjaOG but for 40k and hes payed back his loan already.
Each pawner can set their own boundaries for how much the person will owe for the loan amount and how long they have to pay back the money.