After playing with a ton of spotters at matches over the years.....
Save more and buy in the $1k range. That's about the bare minimum I'd bother with. I'd honestly take a $500 8x42/10x42 bino over any spotter.
As the mag range increases, all the glass needs to be much better to be able to see. I lived in ND for awhile, and you can see the horizon in any direction from most anywhere in the state. That is going to take decent glass to be able to see past where binos make more sense.
The lower cost spotters don't have the resolution, contrast, or overall clarity to mess with in my opinion. I guess I did have a guy tell me his $75 barska was just as good as a Gold Ring because he could still see holes at 100 yards, so it may depend on your point of view.