Trading Full 7-11 set for all of these DLC items:

[ACSuperFan]

Blue argyle tank, kimbap plate, hagoita, red horned cap, blue and white school caps. You must have all of these to trade.

 

[ACSuperFan]

Oh, I just noticed the announcement that no one can sell unreleased items (I didn't know that some weren't and were hacked). So forget about the tank and plate.