first off if they went out of business  are there replacement parts you can find easily or do you have to pay in body parts to get a simple boom or main shaft. next are any other 500 class heli parts interchangable?  if you cant find parts for it and no other 500's interchange then unless your savy and can make parts (like align) which are readily available fit then i would lose it for whatever you can get and find  a more updated bird because the first oops you have it will be  a loss and your out money just my .02