If it's sitting in the field ask if you can strip parts off it. Sell them on ebay or here and then call a scrapper to come get the rest.
If the current owner doesn't want this to happen offer him/her 40% of the take.
Then you can go at your own pace and make some money to boot! Think of future Z potential.
Off course keep the small parts if you have a small closet. Turbo, Wiring harness, Head, Exhaust manifold, oil pan, distributor, oil pump, oil pump drive spindle, Coil ignitor, Valve cover, fuel pump, CV axles, R200 rear end, ECU and associated wiring plugs, AFM and T5 transmission.
Well those are all the parts worth money, you may not get much else but scrap for the rest.