Join Date: Aug 2008
Location: Monroe, Louisiana
Welcome to the forum. If the gas wasn't drained from the carb and tank, both will need cleaning. You'll also need tires and a new battery. Yuasa makes very good batteries that last a very long time. They cost just a few dollars more than lesser quality batteries but outlast them many times over.
In addition to what is needed above, are there dents in the tank, rust on chrome or elsewhere, or other things that would further reduce the price? How long has the bike been offered for sale, and what is the seller asking? A buyer may be willing to take less if the bike has been on the market for a month or two and not sold.
You can look on KBB.com and find trade in and dealer prices. Normally somewhere in between those two prices is a good place to begin negotiating. KBB prices are for bikes in running condition, which that one isn't. I would add up what it would cost to have a shop get it running, install new tires, etc., and reduce the offering price accordingly. If you are handy, virtually everything the bike will need can be done yourself, saving quite a bit of money.