I for one wouldn't pay £4000 for a 2005 TF, I recently bought a 2004 TF for £365, granted it needed a new starter motor (I already had a spare) but the engine (83000) runs very well. The interior is immaculate, a few bits of cosmetic work and it will be perfect. A previous owner wax oiled it in 2012 and the head gasket was done at a similar time. Would I drive it across Europe? Certainly and without hesitation, plenty of others have. The boot is enormous and if you use "squashable" luggage then there will be no problems. We have just returned from spending nine weeks touring NZ and OZ and all our luggage would easily have fitted in the TF.
Another owner paid top money for a TF from one of the "best" TF sellers, all their cars have a head gasket change before sale and he had head gasket failure within a month, he said his guarantee was worthless. I have two TF's the other cost me £600, I repaired the sills using Mike Satur's repair panels, I have replaced every suspension bush with polybushes, all new balljoints and wheel bearings, and added a low coolant alarm, big brake disc kit front and rear, brake servo reinforcement bracket, new clutch, galvanised subframes and Bilstein kit. I have probably spent another £2000 but now have a TF that handles and brakes like very few others