besides getting one through www.valentine1.com
for 399, I'm sure you can find one on ebay for a few dollars cheaper - used of course. however, I would stick with getting it directly through them, and the thinner version that recently came out last year.
also, there are new developments in radar detector detectors, and the v1 will soon be detected. not sure when valentine will develop the newer detection systems (which are just now making it into the market) into their detectors.
I love my V1 and can't live without it. =)