got a 12v I6 m20 (bmw) head that i am looking to get checked out/assembled, i bought it from usa with "45k miles" for bugger all and got free shipping so it worked out OK.
Anyway i got a quote from a shop for $517 that did the following
cut seats face valves wash and check tiop heights
wash & assemble head
Does that sound right? and they would check the guides too when doing that yeah?