The old stoves ( mostly 1940's -50's) are very popular and very easy to repair and to get parts for. I do a lot of them say 3-4 a week. At average $150.00-$300.00 for an hour or 2 max, it's good money. It's 99% labor. The refrigerators are all different. With the Wedgewoods and O'Keefe & Merrit, Occidental and others all used the same thermostats,oven safety valves, thermocouples and other components. Remember 25 years ago most appliances were using the same water valves and switches and other parts so you could repair more off the truck. The same with the old stoves. I can carry 3 thermostats and 2 oven safety valves, 3 different thermocouples and fix 90% of the stoves on 1 trip. It takes a lot of creativity sometimes but it is never boring. The look on a customers face when I am done says it all. I rarely have time to rebuild any for sale as I am busy in the field. I could make a lot more if I had time to do them and sell them. As an example, I recently serviced an O'Keefe & Merrit that was sold for $5000.00 ( the other company who does them)and it didn't work. The thermostats,safety valves ,even the thermocouples were original. Changed 2 thermocouples and new valve grease .( surface burner valves) 1 hour in time $250.00. they were thrilled. ( 5 new customers from that stove) The top was chromed and the grates had new porcelain then cleaned and sold. There is money to be made on them.