Not specific to MapleStory, but I hated every other site's version of this and wanted my own, and since it was easy enough to make for myself and my guild I added it to our quick links here.
Mabinogi Housing Search
Includes numbered results, currency formatting so you can tell at a glance whether it's hundreds of thousands or millions in the price tag, and quick linking back to the full user list or similar items list. Works on all servers, retains state between searches, permits you to set how many rows you want to see at a time from 10 to 100.
Enjoy it if you're a Mabi-goer.
If you're not and don't care, big whoop, I made it anyway, deal.