check your local classifieds; check with a dealer who takes trade-ins. Check with an on-line site such as Craigslist or the auction sites for completed sales.
2) Increasing returns it cost $60 per mower when making either 300 or 400 mowers, but only cost $48 per mower when making 500. Assuming she charges the same price for mowers, her returns are greater (increase) when she produces 500 compared to 300 or...
try johnstone supply they sell lots of ice machine parts....most of the controls are the same .....if you have a part that is a dixon only part that you need would be the only problem you might have...