Cheers
That is the million dollar question. A U900 sounds good to me. It would have to be Diesel, a three point linkage at rear (at front also if possible) Front and rear PTO and Hydraulics front and rear. If I am honest the front option is a wish not a requirement. Preferably at least 100hp for the PTO and Hyd services.
I would be using it for agri and arbourist work. Also to power static machinery, eg log splitter.
Age is not really important, but needs to be in decent condition with no major mechanical problems.
Oh and I forgot about £15, if it comes with a full tank of fuel I could stretch to £20!