Re: Someone got a bargain
if it was a rear side impact and the subframe, rear arms, bushes, wheel, panels (Inner / outer incl boot) etc all needed replacing you would have been looking at least £10k in parts, put against that jigging, labour paintwork etc to BMW M standards, it is quite easily a CAT D. You have to remember when they they do an insurance estimate they quote for everything possibly linked to the accident.
I would have bought this, it has obviously been repaired correctly so no worries, and i am sure the person that got it will get his £6k back when he sells it, so no-one loses.