There has been an interest in the second tester. I got both from a company in Connecticut. They bought it for a project, that never materialized and they ended up storing them for several years. The equipment was sold to me as is.
Before the purchase I spoke to a person familiar with hardness testers. He told that not many things go wrong with this type of equipment and units were most likely operational. However, I will only be able to determine that after testing it. I also would like to have them recalibrated.
So, there is a possibility that one of them will be offered for sale, but there are a few things I have to do before that. Also, if I end up selling, I will offer the unit in the order inquiries are received. I got 4 inquiries.