As infrequently as a bow or bowhunter actually requires the services of a full blown pro-shop it would be in your best interest to seek another one even if it was an hour drive away. Ask around and get some references from peoplebecause sadly the guy you describe is far from unique when it comes to pro-shop operators. In fact rude, greedy, know it alls, like him are why I learned how and aquired the necessary equipment to service my own bows and build my own arrows. Been a much happier camper ever since. And yeah, 125$ for a string change is robbery.