I just bought a Japanese water stone, never tried one before but had heard, and read, good things about them. The one that I bought was not all that expensive, £13 (under $20), that was a whole lot cheaper than the diamond bench stones that I have seen, or the ceramics. So far I have been very impressed with it, it cuts very fast compared to the other stones that I have tried and it was easy to get a consistent bevel. I know that I can expect it to wear down fairly quickly but that is the trade off for the fast cutting. I much prefer using water instead of oil but it is a bit of a pain having to keep the stone soaking even when it is not in use, definitely not a sharpener to hit the trail with but I already wouldnt be without it on my workbench. How much did you see them for, what sort of grits, mine was medium(ish) 800 grit I think.