Thanks very much for posting this! I nearly bought some last night for a lot more (I don't / won't use Ebay) so was only looking on proper sites.
I just bought 100. So £10.99, with a free gift of another 10, and used a voucher code of 10% off by signing up for the newsletter.
So 110 blades for £9.89. For me that works out as 9.89p per blade - ~5p per shave if I use it twice / ~3.2p per shave if I go for three uses. Bargain!
I used one earlier this week and only changed the blade after three shaves because I wanted to try others, specifically some perma-sharps that were a kind PIF.
Thanks once again to the OP, much appreciated!