How much is my OLD burton snowboard worth??

Hard to say without seeing it and the bottom. Boards have changed alot since then, so I doubt anyone would buy it to actaully use. A collector might buy it though. You should take it to a place that sells snowboards and talk to them, I'm sure they could tell you. I just sold a LTD board in almost perfect condition and only got $70 out of it and it was only 3 years old. It has click in bindings? If thats what it has then I dont know anyone who would buy it. Click in bindings are really bad I used to have one and my boot would always come out of the binding lol it was bad.

hard to say but i mean its not too too old so not like $20 000 or something

Not much if anything. I doubt there's even a market for a board that old. Especially when you consider snowboarding only came around in the early 80's, and boards have changed a lot since then. Try selling it on Ebay.

Sorry, but probably not a lot. Anybody buying it would be stupid because it won't last them long. You should probably replace your board every 5-7 years.