For real inexpensive, some of us here have been having decent luck with CenterPoints from Wal-Mart. Usually under $100 out the door. Easy to send back if they break, which they don't seem to? I have one I use for testing rifle builds now and then. So far so good. Another High Roader uses one on his 45-70 pig gun and sop far has not been able to shake apart
I have always been a fan of older Weaver steel tube MicroTrac scopes. Well made and tough as nails. They come up on the 'Bay now and then - usually go for around $90 or so.
As you move up the price curve, I have had very good luck with Bushnell Elite series. Their proprietary "RainGuard" coatings do help in the fog and cold rain - reduces fogging. The glass is decent and they seem to hold up fine.
Vortex gets good reviews. So does Mueller. I like Burris too.
Above these, it gets tricky and you will need to think about the dollar hit more. I don't own a Leupold, but I worked on their scientific instruments back in the day. They make well though out products.
And I even have one Mil-Spec TASCO that I picked up surplus. Marked US Govt property and made in Japan. It's a very nice scope, but so obscure I doubt you'd ever find one?