@Ewhi , as others have said above LR prices have dropped and money's tight out there for the majority of people. If you want to max' out your sale price the 90 needs to be in tip top condition to attract buyers and I think you need to get the 90 in proper ready-for-sale condition. A couple of weekends hard work and a few hundred squidlets is all that's needed. If this was mine I'd do the following and it would make the world of difference...
1. Thoroughly clean/jet wash the whole underside. Dry, wipe off all excess greasy areas and Dinitrol the complete underside until it looks like new.
2. 5x Wheels off, clean and polish.
3. If you're up for this, lightly buzz back the roof lacquer and respray - this is not a difficult task.
4. Off with the tree-rock sliders, front bumper and tow bracket assembly - drop these off at your local powder coaters and they'll come back like new. I note you're in Swindon, A&C Shotblasting are down the road from you in Newbury and are first rate powder coaters and properly refurbish a lot of Land Rover components and chassis. Call and talk with Craig or Lee
https://www.aandcshotblasting.co.uk/
5. Buzz back, clean, prime and Buzzweld paint the rear crossmember.
6. Clean and polish every part of the interior to within an inch of its life.
7. Sort out the engine bay, clean and polish as per the interior.
8. Give the 90 a 100% service, all new oils/fluids, filters, belts, pulleys.
9. Fix the leaking power steering leak - it's not as hard as it seems.
10. Deep clean and wax polish the exterior, again make the 90 look its very best.
11. Finally, take 30-40 photographs to show the 90 in its very best light...on a sunny day take the old girl to a good country setting for a proper photoshoot.
Good luck with the sale + rather than Autotrader, try here as the quality of buyer is better
https://www.carandclassic.com/classic_cars.php?country=1&make=28&sort_1=latest&year_to=2016&search + you can pitch the right price against the competition. And you might find Pistonheads find the right type of buyer too.