Is 3 copies the limit at GS to avoid bans?
From what everyone says apparently your account gets flagged if you go over 4 within a month. I think we've only had it happen to a few people in the GS TIV thread. And for reference I think it's 4 for the same console. It doesn't apply with mlb, but I think you could do 4 per console. I've hardly ever traded more than 1 of anything, so I can't attest to this info personally. It's good to keep in mind though.