Anschutz value

Hello, I was at my local gun shop this afternoon, and I came across an Anschutz 520 semi automatic 22. It looks to be in near new condition, but I know it is fairly old because the barrle says Gmbh. Ulm/D West Germany on it. I don't know very much about Anschutz except that they make world class target and biatholon rifles. The dealer is asking $300. Is this a fair price, or do you know what it's approxominate value is? I already looked on the auction portion of this site, but couldn't find this rifle. It seems though, that 300 is pretty reasonable for any Anschutz. The rifle will be used for plinking and small game. I realize that this is not much information, but I was in a hurry. My girlfriend would kill me if she knew I was in a gun shop today. If I need to provide more info then I can stop by tomorrow.

Thanks,

Will