Ditto to everyone else's comments. I always walk into projects thinking where I could break even or profit from liquidation if I were to never start or else walk away from the project.
For that buggy...I wouldn't pay for than like $450. Someone went rattle can crazy on it and painted rims, shocks, and maybe even the tank and gearbox. He could part it out and get more, but that takes work, time, a little cost, and a lot of hassle.
Make a list or a spreadsheet of what it may need, and then add 20% to that. Often its cheaper/easier to buy a stock runner that's more complete. And some parts are discontinued.
As far as liquidation goes, some SELL price references (not list-&-sit price, this an approx. realistic cash price)....
> Decent axles fetch $100-$150 each on slutBay.
> Foot tub $40-$100 depending on shape. Shipping sucks.
> Seat $40-$100 depending on shape. Shipping sucks.
> Good running gearbox without issues...$200-$275. Shipping sucks.
> Straight rollcage (top and bottom)...$100-$400. Tough sell.
> Complete working steering wheel...$75-$150.
> Clean master cylinder w/ lines...$75-$120.
> Clean rear caliper...$50-$100.
> Good shifter w/ cables...$50-$100.
> Fuel tank, not rusty but complete..$50-$100.
> Suspension, front & back, arms, shocks, etc...$80-$200 for all depending on condition.
> CDI (Capacitor Discharge Ignition) box $60-$100
> Misc stuff..$50-$100.
So...at minimum, you could part her out for perhaps ~$1k at bare minimum prices including -15% for fees if selling it on
slutBay. but that's if the parts are in usable condition.
So don't be surprised if they're asking $1k-$1.2k for it even as ugly as it is if he knows what stuff is worth.
$500 or less, I'd jump on it. Would be a good candidate for a Rotax
Engine swap. Worst case is you have to use some elbow grease (which is free) and part it out and make a couple hundy!