If you want a gun to plink with, with minimal troubles get one of the rugers newer than P89 vintage. P89 MKII or newer.
My dad's MKII has about 6000 rounds through and my 93DC that I got used (no idea how many through when I got it) I put about 5-6000 rounds thru ($10 / 100rd specials are great) over a couple of years, both worked like champs. With my gun maybe 2 jams/misfeeds/stovepipes the whole time, one I remember for sure was a cheap lead RN reload. Otherwise the damn guns digest everything without complaint and come back for more. Glocks are not so compliant esp. with reloads and SWC's.
I was never a big fan of the long trigger pull of the Ruger autos but I got used to it. The Rugers have a nice backstrap so long shooting sessions are fairly comfortable.
I moved on since that gun to a USP-C and now a springfield XD subcompact since I wanted a carry gun. I have put more trouble-free rounds thru Ruger pistols (Mk1, MkII, P89, P93), and rifles (10/22, Mini 14) than any other guns in my adult gun-owning life so I am 100% partial when it comes to questions about what is a reliable gun for the money.
You also might consider a used Springfield XD but I dont think they will dip below 3 bills unless a private seller at a show. I'm very happy with my XD so far.
springfield xd. great gun. i put well over 1000 rounds through mine and never had a jam misfire or anything. also very smotth shooting gun. the cost about 500 though but definately worht the extra money. i dontlike glocks. not necessarily because of the qaulity they are just not comfortable to me as far as shooting them goes.