I've seen players auctioning "parchment turn ins".
This seems a little suspect to me. Maybe it's my history of dealing with the worst of the worst EQ players.
What would prevent a scammer from having a bunch of undesirable spells in their inventory, turning in "your" parchment, and if they were to receive a desirable spell on turn in, give you one of the undesirable they already had in their inventory? You don't see in group what was received.
I guess it's buyer beware, but I still think it would be considered scamming.