Depending on the condition you may have a gem or a dud. To check the condition turn on the organ. That works, Good! The drawbars give different tone based on pitch. Check each one by drawing it out slowly and playing any key. Volume will increase with the numerical increase. Finally open several white drawbars for each keyboard and play each key separately. If each drawbard and each key work check any operating tabs or additional voice tabs. It is best to check all items 1 at a time so you can isolate any problems. With no problems you've got a winner and should be able to sell through the local paper, this forum, or ebay depending on your preference. Best of luck!