You wont get a decent radar detector for $150. First off, unless you are driving long strait flat roads, a radar detector will never alert you before you get clocked. Plus, most cops I know and have ever dealt with wont give you a ticket untill 15 over posted limit. But if you still want one, The Bel Pro RX55 at $229 is about the cheapest decent detector you can buy. Bel used to make alot of sub $100 models that could compete with the big boys, but when Passport bought them a few years ago, they stopped making them (Passport was tired of their $300 detectors getting beat by $100 Bels). And stay away from the Cobra/Whistler crap. But even the best budget detectors like the Bel arnt foolproof. Unless you want to shell out $400 for a Valentine One or $500 for a Bel STI. As far as radar detectors go, those two are the best, with the bel being the best tested so far.