At our store the basic tune up is $30, (1/2 hour labor), plus parts. Everything gets a plug, and most will get a fuel filter. Just cause it's white, doesn't mean it's OK. Sometimes I'll dump the fuel and see how much dirt and stuff is in the tank. Starter dogs usually get a shot of WD. Sometimes we dress the bar rails down if they are only slightly out, otherwise we call the customer and recommend replacing the bar. Carb adjustments are dnoe with a tach, but I find that more often it is the lo speed screw that requires adjustment to set the idle and acceleration, as opposed to the hi speed. The chain is sharpened of course, but if it's really peened over from hitting rocks, he gets a new one. And finally we try to clean it up pretty good because it should really look like it was worked on when the customer picks it up.
We only work on our own brands, (Husky, Jonsered and Dolmar), so we don't have the problem that dolmaratO's has with walkaways. I fact, we like it when someone walks away from a Husky because we can make more money on the used parts than on the estimate. (we sell used parts such as handles and tanks for 1/2 price, so everybody wins). We also try to do a little triage, (spelled wrong?), when the saw is brought it. How does the compression feel? Are the bar and chain shot? Any broken mounts? That way, the customer can say "go ahead and do it", without us having to get a green light by tracking him down on the phone.
Another reason we don't work on other brands, (in addition to all of the stuff I went on about in the Ma and Pa thread), is that you just can't work as efficiently on stuff you are not set up for. Example: Yesterday I was working on a Husky 55 and it needed a choke lever. Looked it up on the computer, it's in draw B6, I put it on the saw and it's done. If it was some other brand, how would I look it up and where would I get it from? It's just not worth my time to have to chase parts for say an Echo, by calling another dealer, (and wasting his time cause I don't have look-up materials), having him ship it,(more cost), all for a $5 part.