In spotting scopes you "get what you pay for". There are no bargins. In your price range you should be able to get a reasonable scope.
Scopes that are any cheaper are a waste of money. A friend of mine bought a cheap scope to take on an elk hunt. I looked through it and although it did magnify, the images were fuzzy looking. A far away elk looked like a bush through his scope, but looking through my scope you could see that it was an elk with antlers. He left in a trash can after the hunt and bought a good one.