Is there any way to discover if it's had the valves adjusted regularly(every 30,000 miles)? I'm guessing it's been done at least a couple of times since it's made it to 200,000 miles. Yeah, $6000 seems rather high to me as well but I don't pretend to keep up with Blue Book values. I plan to keep my '98 for quite awhile longer and I recently sold my '88 Accord several months ago(with 265,000 miles...the engine still pulled like a champ).
I have 164,000 miles on the odometer and it still runs great. Someone on here is approaching 300,000 miles but I can't remember who it is.