Lidl will have various 3D puzzles of famous landmarks instore from Monday 23/12/13 for £3.99 each which seems pretty reasonable.
Product Information :-
Recreate detailed 3D puzzles of some of the worlds most iconic landmarks
Simple slot-in system requires no cutting or gluing
Choose from Brandenburg Gate, Eiffel Tower, Statue of Liberty, Leaning Tower of Pisa, Tower Bridge, White House or Burj al Arab