I can get the basic Retreive device fitted for £250.
In my experience of using it once when my VW Golf 4-Motion was nicked, it helped the police find the vehicle which had been stripped clean and was written off by the insurers. The thieving bar steward was eventually jailed for a huge sentence of 9 months I believe. Anyway, I lost my car (had great spec as it was an import), lost all of my no-claims, increased my fear and vulnerability for my family and thought the Tracker was a bit of waste of time.
Would appreciate other people's thoughts and general advice.
Cheers!