Having begun to REALLY enjoy shooting rimfires again. What is the deal with the Remington 510, 11, 12, 13S, and 13T. I have 2 510's a 513S & T. Prices for these little rimfires is all over the place. Anywhere from $150 to $1500.00. I know condition plays a large roll, but $540.00 for a 511. $hit, I wish I had bought a boat load, back in the day. Just biatching.