1. Shell stocks UB X.
2. Main puts up junk trade
3. Shell offers X
4. Main gets X for junk item
If Tnt DOES look at all it would be obvious. With what I do, the main could just be a lucky reseller who got an item for cheap and can flip for profit. The only risk I feel like I have is if someone reports my shell's trade and it could be looked at and iced, but I feel like if they do look there shouldn't be reason to be suspicious of my main since they're paying something possibly legit for the items.
Ah i see.
Well, go ahead with this then, it's certainly safer than the methods listed in this study, which seems to have been chosen to be tested presumably because they didn't seem completely safe in the first place hahaha.
TNT doesn't look at things without reports these days though, as shown in this study and others. But thats been said enough already, in here and in other posts, and anyways you shouldnt do something if you really feel it may be unsafe.