Not sure what you consider expensive, but if you look on www.midwayusa.com you will see lots of options in all price ranges with owner reviews.

I bought a Tasco 15-45 power scope for 50 bucks years ago. It is, in short, crap. Cloudy optics, poor resolution, can't see .243 holes at 200 yards with it. I would not ever buy another Tasco product, as all of them that I have owned have had the same poor optical quality. Please note that this same scope is now sold under the Bushnell brand, bushnell having aquired Tasco.

Later I paid about $250 with tax or so for a Leupold Wind River 15-45 scope. This is much, much better, but the optics are in no way comparable to the Leupold Gold Ring Made In USA optics which goes for about a grand. It is, however, good enough for me to use at my rifle range and see what I need to see. If i were to want one to use on a hunt, glassing far off mountains, I would bite the bullet, sell the wife's engagement ring and buy a Leupold, Zeiss or similar high end scope.

Good glass is worth the money. I started out with low priced rifle scopes, then made the mistake of looking through a Zeiss scope during a rare combination of events where I had a credit card, plenty of balance left on it, and a wife grateful for jewelry purchased only the day before. BIG MISTAKE because now I NEED to have good optics for all uses. This led to Zeiss binoculars, more Zeiss rifle scopes, a severely battered toy budget and deep suspicion of every other piece of optics I own with the possible exception of two Bushnell Trophy scopes that are adequate.

If you can look through several befor ebuying, you'll have the best chance of being satisfied. Just beware of the consequences of being spoiled.