for an 89 the biggest thing is going to be condition. so it its in really good condition you can get 2000-2500. Or just demo durby it, then sell it for scrap and load it with rocks and get 800 out if it that way and have a blast doing it!
RIP. I hate riding at night for this single fact. I rode out in pataskala last night off jersey mill rode and saw 2. It was a dust, i slowed down wasnt going to risk anything.