They are real nice, my bro has one in blue. I can't comment on the price but if you do get it, I would seriously reccomend in upgrading a few things (after having it checked out to see that the turbos are in 100% working order). Forge bypass valves, MTM Bi-pipe, upgraded F-pipes. My bro was losing 10 in Hg on his vacuum due to a faulty bypass valve, we didn't realise it until we installed his Forge bypass valves. This one guy in the car club i'm in bought an S4 and had cracks and some ill fitting on the rubber parts of the oem bipipe/sections, the oem F-pipes are known to be brittle. Do these and the turbo should be fine for a long time. Preventive maintenance.
Installing the bypass valves are easy, just a little tough to remove. The F-pipes and bipipe are tough, I've yet to do it but would rather pay someone else to do them at the same time. ECU is easy to upgrade, 5 minutes (and a great boost to performance!)