they will probably seize as well give it 12 months.. i know the bleed screws seize in because of different material.. one advantage i guess is there seems to be alot of used but VGC rear callipers from mk4's because they are newer cars. ill happily use them straight off.. the older ones mk3 and mk2 used will almost certainly benifit from a re-con so thats £Â£Ã‚£Ã‚£
what it all comes down to, IMHO what can you find for the least amount of £Â£Ã‚£Ã‚£Ã‚£, in the best condition