Say for example I have a strange festive grenade launcher I want to sell for 13 keys. My shop page says will only take 12 items max.

I understand that it means I can't put up trades for more than 12 items but does it also I can't receive more than 12 items in return? Or is there some buffer amount that would allow me to sell and item which would return more than the original items numbers.

The same situation would occur if my shop was full and i was selling an items for 2 or more keys. 1 item would be removed and 2 would replace it. This overfilling my shop.

Thanks.

Koops.

There is a buffer, but during that buffer you cannot sell additional items from other trades.