$30 is fair for sure if you are just handing the bike over. In truth, when he does suspension, he sets sag on our shocks so we slap them on and we are good to go. I'm talking about guys that charge $50 and more for the service. WAY crap in my mind... Some guys on here were asking $75 plus to do basic suspension settings and I think that is ripping off fellow riders. Especially newer riders that want to learn. I feel they aren't going to really notice what the bike is doing until they get more seat time. BUT, they certainly can give comments that would paint a picture to point you in the right direction to go with. Like way too soft and plush, wallows around like a school bus, etc... A lot of times, we take a kid that has got a bike and simply clicking knobs. We set it up for proper sag and bounce it a bit and get it "close" and send them out. If it were us, we would start there and probably make changes to suit the rider's riding style. But, newer riders come in and are blown away as to how much better things feel. Suspension is amazing if you have it close to good. It's a struggle if it is way off and typically, it is. Guys run their chains too tight also. This is restricting the travel of the rear end and can create a false problem. Meaning, if the chain was loose where it needs to be, the rear end could travel more and work properly and really feel 100% different with just that change. I also think a lot of times, it is mental. My dad used to click knobs when I would tell him the bike felt weird and was holding me back on things. He'd click some and I'd come back and run faster and tell him it was the change he made. He later told me he didn't change a thing! A lot was in my head. Since, I am not a knob clicker...