The belts are around $50, plus labor. $75 is a fair ballpark to have them done. If you figure you'll probably want to get an oil change at the same time, it might be closer to $100-$125 out the door.
$125.00 total for oil/filter plus belts, parts & labor? I'd say that is on the low side. Don't know about costs in the area where you live.
Even if you spent $200.00 it would be well worth it for someone who knows what he is doing.
