I don't think extreme is the right word, Chris - sorry to be pedantic.
Members with a hobby are unlikely to have a unit, insurance (although I did) and any overheads apart from product costs. Therefore, they can afford to charge lower prices than businesses such as Russ@midlandscarcare and Jim@Whitedetails.
However, with that comes the hobbyists pitfalls of amateur vs pro, knowledge vs experience, up to date product knowledge vs Halfords best etc.
Get a quote from Russ or Jim, see if you can stomach spending that on a detail - if not, come back to us. I would spend it with those guys, but my expectations of budget are more aligned than yours.