Only just read this thread and there are posibilties here. £250 is a good price as you could make something out of this. Now I am talking with a hangover but bear with me.
The front torsion bars are a uprated. I have a Mk.I Trooper Lotus edition and the handling is astounding. I have driven a normal one and it wallowed around corners whereas mine hardly pitches at all. They would be a good modification to any truck. The shocks are fairly tough as well. I think they are stronger as well. If you can get them off in one piece then they would also be a good thing to keep. I am on the original factory ones and they are still going strong 21 years later and over 100k miles. I would be surprised the engine is cooked to be honest. I would run a compression test on it to make sure. The 3.1 is based on the 2.8 so by default a hardy block (though not quite as strong as the 2.

. There are lots of little things people would be interested in. If the steering wheel is in good condition I would be interested in that as mine is falling apart. Does it have a rear ladder on the door. Again I would be interested but other Trooper people would part with cash for it. The Lotus editions had no modifications to the engine and gearbox however. But 3.1 engines are always up for grabs if you want to convert your truck. However I think the wheel base is different and you would have to change prop lengths as well as making top mounts for the coils etc. If you have G80 on the VIN plate (and being a Lotus Edition I would be surprised if it wasn't) then your onto a winner. However the gear ratio's may be different to yours. If you are going to put the rear axle in yours you may well have to change the front diff as well. Check your 2.3 VIN. I have noticed a lot of them have LSD as well. If that is the case the Trooper axle is of no real use to you ... but it can be sold with the front axle as a pair.
Parts to consider is things like the brake and clutch master cylinder. They may be the same as yours. The clutch slave is the same as the Frontera (I think but you would have to confirm).
Bits of trim like interior may be interesting to Trooper peeps. The seats for one.
Obviously as you say the rest can be sold for scrap.
One interesting note is the axles on the Trooper are wider than the leafer Frontera I believe. This means you can gain a bit of clearance for larger wheels at the front when turning on full lock.
Just some ramblings
