$600 · Septic Pumps, Controller and Alarm

My septic field failed so I put in sewers. I have an aeration/ transfer pump, discharge pump, complete controller and a high level alarm. This is basically a full working system. The discharge pump was bought new in Jun 20 for $1000 and the controller was new in Mar 21 and was $900. I'm only asking $600 because I don't want to store it and I figured someone out there could use it (knowing how expensive this stuff is).