Excellent topic of discussion.

I agree 100%


Once the item is traded, SPF or sold or even withdrawn the need to

1.Properly update to status of item
2.Leave the add as it was before add was updated
including the asking price or whatever price there
3.Re-update the post when transaction is complete wether shipped
or sold and the transaction finally took place.

I think this is used on other sites to allow for an idea of fair market price.