Your best bet is to do the following......

Ask how much he wants for it .....He might just say $200....give him the $$$$

Or he answer what's it worth... offer $200 and see what happens....He may say $250 and its yours ....Give him the $$$$

Or he my say Not For Sale... just ask him to let you know first if he decides to sell.

Just make sure you have $$$$ with you when you do this so there is no time for him to look up the going price and back out.

Johnkpap