Agreed.
The BM-23's are generally solid units, I've got one that's been in constant operation now for 6+ years, the first 4 in a residential setting, and the last two commercial. The unit has been strapped to the back of a large fishing vessel, and poured countless thousands of pints and with regular maintenance and cleaning, never needed any repair work. I know of units in the field that have been operating in commercial settings for 10+ years.
That said, make sure you inspect the unit, fire it up and make sure it blows cold - the air coming down the back wall should get cold relatively immediately after firing it up when the compressor is running. Also inspect the condenser fins and see if they are clean, if so, the unit may have been cared for, if they are dirty and plugged up with dust and debris, the unit may have been neglected and have a shorter life.
Good luck!
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