I also have a 2nd hand one of these SARD R2D2s. Its basically brand new as i only had it on my car for genuine 1000 k's.
Perfect nick, save on buying from new. Reason for sale is that i have changed the sounds/bov to HKS SSQV.
These blow off valve u wont get in this condition at this price as its bascially buying new and i have tested it for u and its working perfectly and loud too .