While browsing for strops I stumbled across this deal. To be clear, I have not purchased this strop or anything from this vendor. I do own a Kanayama 50000 and love it. To give a perspective, Aframes Tokyo sells the 30000 for $152. That's the lowest I know of. MTC is selling Kanayama 30000s for $110.
Sharpening Stones - Brand - Kanoyama - MTC Kitchen
mtckitchen.com