Just want to put it out there; if you sell a meat collector or a butterfly milker which is not empty, they show up at the purchaser's doorstep with contents intact. It would be nice, however, to be able to add a note to the auction stating the contents, or have logic that adds what is inside so that a full one can be reasonably charged more for than an empty.
I won't have time to skill up to RHK before the beta's end (if the Thursday PDT end of test time is true) so I sold my full ones, but couldn't let buyers know what they were getting, exactly.