Listen to usp9....
Browing Buckmark. Occasionally you can find the basic one new for $300-$325, but you're probably looking at used.
Other Good Options in that price range: New S&W Model 22, Used Sig Trailside, Walther P22.
Friends don't let friends buy Rugers, especially in these pistols - unless you have 3 hands, you ain't gonna reassamble one without a lot of cursing. Why anyone would buy a Mark 2 or 3 when the Buckmark is roughly 400 times better looking, AND cheaper, AND better made, AND easier to assemble/disassemble, and equally accurate, is just beyond me. Unless it's for the aftermarket doodads. I guess people just don't look at Brownings and compare them- must be a marketing/availability thing.