I got a 2-7x32 Redfield revenge for 130 or 140 with a 40$ rebate. Nice clear scope, excellent value, especially after the rebate. The Redfield revolution in the same power is a tad more then 150 and an even better scope
Paid $149 for a Burris Fullfield II 2-7 x 35 that I really like on my Ranch rifle. It has a "Ballistic Plex" reticle with BDC stickys for most popular calibers including the 55 gr. 223. I use this on my varminting gun.
Paid $289 for the Nikon M-223 Point-blank reticle on my Tactical that I use for 3 gun. It's an awesome piece of glass! (50/200 zero, 1-4 x 20)
I like the Nikon prostaff, a better than average scope for the money. I have one on another rifle that groups consistantly less than 1.5 MOA with my handloads. The point though is that it is a good scope that holds its zero, and has good (but not great) glass. Definately a good fit for a mini.
I don't know what configuration your rifle is in, but if it is 'old school', an old K4 Weaver @ 50-70 bucks on Ebay may be a choice. They're not the latest tactical-cool glass, but a simple fixed 4x scope that delivers.
It looks like you have the mounting pads for rings on your rifle. I would not use a scout mount and long eye scope unless that is the only option available.
I also agree on the rimfire scopes. They are not built hardy enough for the shock and impact these rifles have. Most all of the cheap scopes may stay on there but they will tend to loose their zero.
What I did is convert to a picatinny rail. The Ruger rings would not stay tight on my rifle. It looked like they had just been shot loose too many times. I got my rifle used. I have mid height scope rings for a standard scope and a Bushnell Trophy 3-9x40. You need mid height rings to clear the front fore cover of the barrel.
I think if you are after the little yellow dogs at 200 you would need the 9 power. I do anyway.