For my Civic's 200k service, I am finding the "extra" stuff is where some of these dealers are trying to whack me. Many have read about the $389 timing belt service at Hamilton Honda in NJ. I called them to see how much adding gaskets, seals, etc. would be. Close to $700 when all was said and done. Still an OK price overall ,but my local dealers can come close to that without a 3 hour drive. Another one went from $450 coupon for a basic t-belt service to $800 after tensioner, seals and gaskets being added. Another dealer said I don't need to replace the tensioner, so didn't include it in the quote. Other places won't respond to emails, and I haven't had time to call a bunch of places.
An indy shop I went to quoted me over $1k for a non-OEM parts set without a tensioner. Last round it cost me about $900 and I didn't do the cam or crank seal.
At 200k, I was going to do the following: T-belt, water pump, tensioner, cam seal, crank seal, valve cover gasket, and drive belts. I'll probably get the radiator hoses replaced too while it is drained. Hopefully there are no surprises.