i think the price and quality association is way overrated. the expensive bag that 'will last for years' is probably used less, treated better, and not really kept 'for years'. if the quality was truly that much better, would you really need to baby it for fear of marring it? and before the MP closed down, i wonder how many ppl were selling bags they believed they'd keep forever? treat a less expensive bag the same way and yea, it'll last years too.
and by less expensive, i dont mean the really cheap glued-together bags either. so far, i haven't been convinced the price difference is worth the quality difference.