Rutty is spot in in what he's saying. Scatt is great, i use one regularly for both 10m Air Pistol and for 1st shot training for Rapid Fire. I am fortunate in having a coaching team behind me who are experienced and knowledgeable in the ways of Scatt! Scatts can be adjusted to show you a variety of different information, and graphs can be created to show averages for shot times, movement before, during and after shot release etc etc. It is important to remember that a Scatt is complex IT, and to benefit from it you must know your way around it (or have a coach who does) if you have training partners, or are a member of a club then consider buying one as a collective.
Scatts come up on here, Stirton and other forums, and you can probably expect to pay somewhere around the £500 mark for a 'Scatt USB'. Alternatively I believe that Diverse Trading (Paul Cutts) is the licensed importer for Scatt products in the uk so give him a call for a price on a new one.
-Nick-
Fierynick
+Keep Calm and Shoot Tens+