it all depends on the fly being tied and how it is used.. i find lots of hackles and legs fall off of most flies tied or store bought but if u are rough on em with forceps(twisting them out of a fished mouth/clamping down on teh flies body(forceps with teeth are even worse... same with tearing off the crud u pick up off bottom, u can rip off legs and tails... most of the damage is done there .... same with ripping em out of trees.. fly quality is something that always makes me laugh.. if the fly looks good but has a bunch of brittle components dont be suprised it only lasts a few fish.. fly costs have gone up same with most things but that is the way of the world.. is it cheaper too tye your own flies.. hell no.... specially for most of the flies u see in flyshops..... the thing ive noticed in flyshops, big box stores and online sellers are cheaper flies are cheaper.... usually more basic patterns, poor quality ties and the worst part is cheap hooks..... keep in mind alot of those 3 doller nymphs and streamers have tungston cones, crystal flash things like that and better hooks..... if i were still buying flies i would get the 3 doller ones over the 1 doller flies any day of the week!