Plenty already on here about what these things do but a quick synopsis:
Removes fuel limiter
Remaps fuel curve
Increases Rev limit to 8,000 rpm
Removes speed limiter
Improves throttle response
Increases boost to around 17psi
Increases stock setup by 27 bhp
All in all you get noticeably greater torque across the range and
approximately 10-15% Bhp increase, this unit uses Blitz "Fuzzy Logic" which basically means the unit takes in to account current engine setup and makes its calculations accordingly.Oh and because it makes got Tubby run slightly richer you often get pretty flames out of your exhaust
These are plug and play and will fit straight on to any Rev 2 Turbo and can even be fitted to other Revisions with some repinning to the plugs.
The Blitz Access is arguably the most sought after of these Jap made performance ecu's and they are getting rarer and only increasing in value.
If you check eBay they tend to fetch £500-£700.As you can see in the pics all seals are intact and it works perfectly.
All in all I think
£395 shipped UK is fair.