I think something has to be done with the marketplace. I dont know if it would be possible to have some kinda of program or something that after a marketplace has been up for certain amount of time e.g 7 days, it would be moved to a 2nd older marketplace.

I dont think they should be outright deleted because although some of the things there are people looking for pts in exchange for something, There is still some things in the market that are for repayments and to delete them people might lose track of who owes them what.