Dear Sir
If you are seriously looking at buying an old airplane you are not talking to the right people. The used aircraft market is different than what it was a few years ago. You can get a GIII for the 1.25 mill right now. There are nice Falcon 900's going for 4 million if you know what you are doing. Send me a PM if you are really in the market, you need some professional help. I am not it, but I know guys that are great at this. I will not even snag a commission, just trying to help you out. I am currently flying a G550 and it is not exactly a great investment, but the owner has more time than money and wants the convenience of going when and where he wants.