Ive seen signicficant variations in price. The base unit (like TX360 says) is about $400 but i beleive there are lots of parts necessary if you want to conceal it completely.

Here is a site that offers the V1 with installation kits.
http://www.1-radar-laser-jammers-detectors.com/valentine1-radar.html

Their site is a little confusing. They sell the completely hidden installation kit for $400 and the the V1 with the kit for $795.

This is the only place I could find a completely hidden V1 installation kit. I dont know why it cost so much though.

I like the idea of a completely integrated and hidden installation. The k40 offers that but its not as good a detector. However TXgreen uses the k40 and likes it.

i probably have to buy the v1 for 1000 because it´s a special one for european market.