It has been said before by myself and others, just because the L322 can now be bought for prosecco money, it is still a champagne car. They are not cheap to run,cost of repairs are usually high(medium if you're lucky) and should be taken into account before buying.
Personally, I don't think it's a false investment getting the gearbox fixed. I only had mine done last year and I couldn't have bought another car in the class of a Range Rover ,or anywhere near it, for the price of fixing it. A cheaper car may mean cheaper bills but you bought a Range Rover because it was what you wanted, a couple of grand won't buy you much on the car market but a couple of grand on a gearbox will give you your Range Rover back.
