I mounted a simple Bushnell Banner Dusk to Dawn 1.5-4.5x32mm on my Black Diamond XR with some Woods Trophy Mounts ( you can get any cheaper then that set up ). It has excellent light gathering ability, great clarity, and had not moved a bit in five years of pounding.
I was hunting a friends farm and he walked down to the blind to sit with me. He then looked through my scope and was commenting on what a great scope it was. When I told him the price, he refused to believe it. I hunted that night to the very last minute of season. Even when I could not see through the binoculars into the woods, I was still able to watch a nice buck (it was doe only) standing in the woods watching the field. Through that scope, I could have shot.
I have two other scopes on muzzleloaders and they are even less expensive. One is a Simmons Pro Diamond 4x32mm. This was a $39.00 scope. I bought it because Semisane was bragging about one, and I was determined to get one and break it. Well I liked it so much I bought two more for other rifles.
I also have a Simmons Pro 2.5x20mm on a Wolverine. Again, this one was $19.00 (Natchess.com). I was sure this one would not last. I shot the Wolverine last week and it is still dead on from last year with this scope. Simmons scopes are very clear, and gather light real well.
If you want a scope that will hold for you until you can save lots of money for a big dollar scope, and then when you can affford it wonder why you need it, you might look into these mentioned.