a site im working on (was just about to update w/ a diff layout + some shit is broken, etc) has a useful map built into it where you can check out price ranges
http://www.findlasvegasrealestate.co...ap_search.html
just fill out some bs for a user/pass if you want to see the full details n stuff
ended up putting this site on hold because the guy i was working with backed out on me... but a decent amount of functionality is there + the latest listings (updated daily at 11pm)