Hi,
This is a good price for them and Darren Thomas had quite a reputation for his woodwork skills (I never see him post anymore on AC). Dennis Murphy did the original xover design and then Dave Ellis did further refinements. Jim Salk also builds this speaker which sells for $1999US.
I read many threads from new comers wanting a recommendation for a speaker who are considering commercial speakers. You can't do any better than these speakers for the price.
Cheers Rod