I am going through the process of buying a home that has a nearly 25 year old system and would love some experienced advice. The home is a short sale situation and when inspecting the geothermal system there were a couple of issues. First off the loop was not pressurized and when bringing it up one of the pumps on the flow control was leaking. Also it was in an error state to begin with due to the compressor locking out. I imagine this may be due to a possible refrigerant leak and since it's an old system refrigerant is hard to find and costly. I asked the technician to shoot me a replacement quote assuming the ground loop is still in good condition and it came back quite a bit higher than expected. Looking online I would think it should be somewhere between 8-12k to replace and install. Am I missing something? How much should I expect to pay? Thank you for your time and consideration with any help.