Refrigerator

I work in the HVAC field on large piece on machinery. The RV frig is like the absorber units I used to cool the University I work at. Both are chemical reaction. I can here the liquid peculate, bubbling, gurgling or trickling noise. I have looked at ebay for replacement Dometic RM2804 $525.00 for used/rebuilt and $580.00 new. Just trying to keep at cost down. I bought the rig at a lot that sell donated item for a homeless charity. I was told the tags where up to date. Wrong, hadn't been paid sense 2006. The tags where stolen,and $1,300.00 later it was mine. So far the generator will not run, the lpg heater does not work, I know the fresh water pump was missing, but a direct replacement is not available. A re-plumb job. I can not get the arms on the awning to move in or out. The dash a/c doesn't work. The two roof a/c need recharge. That I can do at work. Roof need paint and sealing. I hope that is all that is wrong with it.