What is a Good Pistol Scope?

Hi guys! I'm new to air pistols and I am looking for a good pistol scope.

Please let me know what your favorite scope is and why.

I'm wondering these things:

What's the best affordable scope around $100 (up to $200)?

What's the best scope I can get for a pistol (price excluded)?

It's going on my Ataman AP16 PCP pistol, shown here with a Barska rifle scope attached. 

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I have never liked Red Dot scopes because the Point of Impact seems to change if you move your head. I would prefer a pistol scope that has cross-hairs. If there is a Red Dot with a small dot that doesn't wander around that would be cool. I have no idea what they are making these days. Thanks in advanced!