Guns are not priced by stopping power...brand, age, condition, new/used and other factors.
When I went shopping for a 1911 45 I found them from $350 to $1800. Caused me to reflect on what I really wanted it for - target shooting/competion in my case, so long barrel and adj sights. That eliminated most choices - and all the cheap ones.
Magnums have the best stopping power followed by the bigger the caliber the better.