I'd say your "proshop" dude must have a pretty hefty dollar amount figured for his time![&:] Coming from someone who builds arrows for people on the side , I'd say you walked away from that deal smelling like a rose! I would have refletched and crested your arrows again at regular price (my mistake) rather than giving you half off the arrows and $60 worth of mech heads for free.
I'd say your proshop dude is probably swamped with business right now and it sounds like he bent over backwards (to avoid extra work for him) just to make you happy!