I saw a few Mossberg .223 bolt actions this weekend at a gun show, all going for around 600 dollars. They looked good to me. I noticed that they use AR15 magazines, so you'll never have trouble finding a magazine. Good feature!
I bought a Savage model 25 bolt gun in .223 while I was there, but it was more expensive. - Closer to 900 bucks with a 2-7x40 BSA scope and 100 rounds of 75 grain HP match ammo.