Is your feature request related to a problem? Please describe.
Selling items that I normally keep in my bags, like healing potions, glider kits, etc, often leaves me with none in my bags and I have to produce some more or run to the back to pick a stack. And often enough I totally forget to restock.

Describe the solution you'd like
Would be nice to have an option to post "Max number minus ##" by default, or max# minus 1 stack, or as it was in the pre-8.3 Auctionator: offer "max# of full stacks" (that perfectly worked to post, say all 23 stacks of potions, while leaving some for yourself)

Could you be more specific?

This is an old feature request, and as it hasn't been done by now it seems unlikely it will get completed, so going to close it.