The time before a trade should be deleted automaticaly should be decreased to under a week. I feel like there are to few people that want to trade an offer that they posted over a week ago. I very often even get no response when i message them (again talking about their own trades, not mine). Or you could add a feature that tells you after a bunch of time of not getting a request that maybe your offer is not fair enough and that is why no one wants to trade for it.