Well, I guess I'm one of those guilty of putting lower cost scopes on nice rifles, or I should say, on some of them. Most of my rifles wear Leupold, two have Nikons, and a couple of Simmons and Tascos, one has a Weaver and another has a Redfield. I've had "Leupolditis" for years, but have learned that the world turns with or without them.
Mike at DTech is building a 6x45 upper for me that will get a Leupold 4x12 A/0 Vari-X 2. That scope is just waiting for that new upper to arrive. But, I already have this scope, didn't purchase it just for this rifle.
I think there are a few scopes out there that are underated. While I prefer to have top glass, at least Nikon, I can't always afford it right away, and I think a lot of others are in the same boat. Currently my flat top Bushmaster has a Simmons Atec illuminated 2.8 x 10 that I really like, and paid about $120 for. It holds zero and works very well for what I use it for, a calling rifle, and that illuminated reticle is great. I also have another scope that I sometimes switch out on the Bushmaster, (which allows me to shoot different bullets zeroed with each scope) a Tasco World Class 4x, 5" eye relief, and I absolutely love this scope. Didn't pay much for it (about $80), but it fits this gun perfectly, is clear, holds zero, and has a nice crosshair. I've taken two bobcats while using it, and a turkey. Actually, if I could find this scope (it's no longer being made) I would buy a couple more at less than $100 each, since I like it that well.
As for resale value, I never consider that. I purchase a scope to use and keep. Leupold definitely has a good resale value, but as many others have said, they are over priced.
I guess we all would like top end scopes, but sometimes those top end rifles drain us of money until such a time as we can add a better scope, IF indeed there is ever a need or desire. Right now I'm very satisfied with the Bushmaster and it's Simmons and Tasco scopes. I don't have any immediate plans to put anything else on it, at least, not right now. I may never, and not because I can't afford to.
Good Shooting.