At the end of each GP series you might be able to pick up a bargain, I got Rossi's title winner last year for about $6000.00 a few mods later shes putting out 250hp and looks got with indicators on it. Hopefully I got first dibs on his 4 stroke cause I want to put the NSR 2 stroke engine in my dirtbike.
I say a 91 750 with a 2k2 gixx 1k engine and tons of spray. The one with the egg carton and duck tape mod that was mentioned for weight loss and of course the kill switch removed (who needs that). That should entertain you for a while.