If its an older electric, the CONDITION AND AGE OF THE BATTERIES determines much of its worth as you're lookin around $600 + for a new set. If its gas the age and condition of course.
I gave $500 for my 95 Yamaha from an old widder woman and my 2000 EzGo Electric was gave to me but needs new batteries. The heavy duty higher rated at Sams are around $100 each.
The later model 48 volt have a longer range/time between charges
Since at the Florida Flywheelers I may drive 2/4 hours a day in that sand hauling 2 to 4 people with a lot of stops n starts an electric is out of the question so I use my gasser which can run all day n night on little fuel n never needs 4/6 hrs of recharging of course.......
At Ted Everetts auction used gas models around 5 yrs old that just came off lease bring around $2,000 and electric less.
If all you have is shorter trips an electric is handy but if youre runnin all over the farm up n down half a day or more you need a gasser
By definition, its "worth" what one person is willing to give and another take REGARDLESS of the price lol