I own an early td4 Freelander and love it. Its fine for muddy trackes and fields. Ground clearance isnt as good as my td5 disco but its fine for what i need it for. I picked mine up cheap off ebay. It needed a few bits doing but i knew this when buying and it was very cheap. The seats fold up easily giving bags of room for shooting kit(five door model).
When buying check that the VCU, IRD, front and rear prop shafts have no bad noises coming from them as they arnt cheap to replace!