Easy enough to check eBay. My guess is 25 to 30 bucks used unless had their yearly calibration. Calibration can cost more than the tool. On meters, torque wrenches, calipers, mics, etc my annual NIST certification costs are over 2,500 bucks. For reloading, none of my stuff gets calibrated. No real wear in clean home environment on mostly brass.
Edit
Just checked ebay. According to condition on actual closed and sold similar units price was 28 to 78 on similar items in same brand. The black face dial units were fetching the higher prices.