Since wooden butchers blocked were banned in the U.K. they have now sold like hot cakes to trendy people who want one in their kitchen. They always make a lot of money at Auction usually around £300.00 and I have seen then on sale in Antique outlets for around £700.00. They are so popular they are being reproduced now.
It's strange to think butchers used these all the time to cut the meat up and just wiped them down, no way could they be sterilised.