Mosin Nagants are excellent bang for the buck. Be careful, they are a "gateway drug" for mil-surps!
Regarding prices, you're in the range for a standard 91/30 model. Prices can be all over, and seemingly small marks can boost the price (for example an "MO" is a premium over a 1942 Izhevsk, etc.). Here are recent M91/30 sales data