Right, here you go.
They are all used but still in good condition. The 13-29 has a chipped tooth on the biggest sprocket but still functions perfectly.
They are:
12-25 record (i think, ti sprockets on half of it)
12-27 veloce (from memory - this one is in the best condition, hardly used)
13-29 centaur (good condition, plenty of life left in it).
How cheap is cheap enough? I don't run 10 speed campag anymore so it's no good to me. How about any one £25 posted, two £45 posted, all three £60 posted?