The ori ones are quite scarce nowadays - due to the fact that loads of saga/iswara owners are hunting for it - and of course, prices went up dramatically.
Methinks few ppl selling off the imitation ones (very similar to the original ones) but material is from fibre/pu. Check out the exterior and body section.
Lately there are tons of fake skunk2 manifold out there for sale in the marketplace, beware and don't be fooled. Skunk2 has posted this information on their website to warn...