We tried to make the tool as intuitive as possible, but I'm sure we have plenty of room for improvement.
If you try out AuctionMapper and find anything confusing or frustrating, please let us know how we can correct the problem. Currently we are mapping only the lower 48 U.S. states, but plan to expand if the project is successful.
Our goal is that by using the category tree, item finders, and instantly-sortable listviews, you can quickly find what you're looking for even if you never care to locate an item on the map.
Naturally, we would also appreciate you alerting us of any bugs that crop up.