Very very awesome!
I do wonder if the way it's set up will be confusing. The link for "find auctions" is in the same place as always, which is very different, interfaceally, from the "find sellers" tab. They need to be closer together. Also, "find sellers" needs to be changed to make it obvious that it's just for towers. Auctions come from sellers too but aren't included in the "find sellers" category.
I think having two tabs, for "find in towers" and "find on auctions" may be good, especially if several auctions themselves could be shown in the tab. If not a tab for the auctions (want to keep it just as a link) I propose the "find in auctions" link be much larger and possibly towards the bottom, and the wording on "find sellers" changed to "find on auctions" or similar.