The M47 engine is generally reliable, it likes good filters and quality oils. You can get Genuine LR service kits on ebay for under £100.
The EGR valve clogs up, £45 to blank, easy job to do.
The hoses split with age and oil contamination, you can get replacement silicone ones for about £120.
Removing the crankcase filter for the modified BMW vortex filter, about £40.
Auto's are better for off road and towing, but do 3-4 mpg less, and some of the 55-06 ones fall into the £460 road tax bracket. Change the oil in it every 60k for a good box life.
Manuals are decent, but can suffer from master/slave cylinder problems. If it's the master then it's about £137 part and then labour. Slave cylinders are a gearbox out job and a new clutch/flywheel for peace of mind.
Make sure it has the VCU and props fitted. If they are missing, it's cause the VCU is fecked, don't buy bulls
t about it being in 2wd for fuel economy, it makes little difference in real life.
Prop bearings can grumble, £40 from foundry 4x4 for proper GKN ones,
Otherwise, just check the electric's all work and that the boot doesnt leak.
Buy SE or HSE spec for best toys.