Linear slides

Oky Doky, I'm now giving up my search on the Holey Grail of sites that lists
prices and not just model numbers.
I'm looking for a very, very, rough idea of how much a 1000 - 1200mm linear
slide would be to carry anything over 5 - 15kilos. Infact, has anyone seen a
site selling linear rails, slides, bearings etc with prices on it? Or is
this a "If you've got to ask you can't afford it" thing. [John gets his
oxygen mask ready for the replies]

John H.