Depends on exactly what they're doing. Personally, I think it's a bad idea to shop 90k service on a 100 trying to find the cheapest rate. Lots of little stuff comes up during that job and you really don't want a shop skimping. The good shops will include much of that in the estimate. A normal shop will bill you for all the extra work. A bad shop will send you away at the original low estimate with a handful of worn items put right back on or ignored.900 to 1,200?