Sauers are high quality guns, made by a very old and well respected firm in Germany.There are many different models, but Sauer guns are typically built with a very strong action, including multiple locking devices and good hand fitting. They were most often built for the European shooting style, more "heads up" than North American or British shooting, so were fitted with a lower comb than many Canadian shooters like. If it fits the shooter, they are very reliable guns and are a good value. Prices I've seen for the fairly plain boxlock actions like yours range from 500-800 dollars or so, but can vary a lot depending on good ol' supply/demand. You'd need to spend at least a couple of thousand to buy a new gun of comparable quality. I sugggest you check the chamber length to be sure, most of the older 16's had 67mm chambers, ( about 2-1/2") so shorter shells from companies like Gamebore may be required to feed your gun. The barrels should be marked with chamber length in MM's, or have them measured. I shoot a couple of 16's, it's THE classic upland bird guage. I think you'll enjoy yours!