There's a difference between affordable and cheap. I got a spinner carry-on/check-in set for $100 and it's affordable but not cheap. I don't worry that it's going to fall apart, although I know it's going to get scuffed or even run over. Ever seen the dream sequence in Three Kings where the reservist who is a baggage handler is thinking back to his regular job, where he has to deal with luggage flying open all the time and where he has to jam it back in. You can't really worry too much about cosmetic damage, since it's inevitable.
Some of the best luggage I've gotten was from off-price stores like TJ Maxx and Marshalls. Costco has some really good deals too, but then there's the issue that it seems that someone else has the same set or piece. I got one set and last time we flew I had to do a double take when I saw an identical set. I know a lot of people tie fabric strings to the handle or add stickers. I added a few, but they fell off every now and then.