Ptac Units & Gas Units Has Anyone Purchased A Suburban Dynaline 3 Gas Heating/electric Cooling PTAC Unit? Model? Opinions? Cost Paid?

Has anyone purchased a Suburban Dynaline 3 gas heating/electric cooling PTAC unit? Model? Opinions? Cost paid? - ptac units & gas units

Should I my current machine is 30 years old and produces more heat. I could find accommodate the unity of the same size with the gas-cooling heat and power elsewhere on the opening of the same size.