Scope quality is directly related to scope price.
With a few exceptions this is 100% accurate. The question is how much quality do you really need.
Personally I've not seen a sub $150 scope I'd give to my worst enemy. (new, MSRP 2013 prices), there are good used scopes under that price, and sometimes stuff on sale. A Nikon Prostaff at about that price is the least expensive scope I'd recommend to anyone. Sometimes the cheaper scopes work, at least for a while, sometimes they never work right out of the box. You can spend $150-$200 for a decent scope now, or spend $50-$100 now, and then spend $200 later. Trust me, if you buy cheap now, you will be buying again, and there are too many GOOD $200 scopes to let a few dollars come between you and a decent scope.
For most people there are LOT of scopes selling right around $200 that will be lifetime investments capable of any hunting, anywhere, under any conditions.
Upping the price range to $300-$500 does net a bit better optics, but you'd have to be pretty picky to notice the difference in the $200 scopes.
After that the sky is the limit. If someone has a $3000 budget, they make $3000 scopes. They are better than a $300 scope, but not 10X better, and do nothing for me that a $300 scope won't do.