I use the items for sale lists to determine a price for what I need to sell, so by you deleting them, you defeat the historical purpose of items for sale prices.
(Shame on you. No beer today, until at least 4:30PM.)
Jim
What I delete are the last updates that say things "List updated to add radiator".
I then add radiator to the list (post #1).
Later, if I add another item, I add another post like "List update to add alternator" and then delete the previous radiator post. The radiator will still be in post #1 as will the newly added radiator.
I rarely bother with Bump, but if I do I delete the first bump and add a new bump.