Here's one people may or may not be interested in.
I list on ebay 2 ways: First I post a standard auction, then if the item doesn't sell, I post it in my store.
I'd like to see an additional field for different starting prices. This could be set up when building the inventory.
For example (in my case, anyway): When posting a standard auction, the starting price is $1.49. When it gets posted to the store, it's $2.50.
With this, after the auction ends (if unsold) and it's queued into a store, it would automatically have the store price filled in.
This could also be expanded for the # of days to list. Say, 7 for auctions and 30 for store listings.
Just my 2 cents.