I don't know if anyone on here has an answer, but here it goes. I've got the above mentioned tank and its compressor that's been stored in a barn here for at least 20 years. It's a DeLaval and when it was stored it was a working tank. I've been approached by an Amish farmer who would like to buy it for his operation (they are starting up a milk co-op and apparently each farmer will have his own tank at the plant, not on the farm). I'd like to accomodate him, but I don't want to get taken to the cleaners, either. Does anyone know what a fair price would be for a tank like this?