Hello All - I need a new blade for my Robo - had the old one yonks and think it has simply worn down in depth now. I have seen a person advertising on a well known auction/selling site. She is offering 3 (blades only, not the housings) for about £17. This works out at about half the price. When I looked at the feedback she appears to have sold dozens of them. Has anyone tried such a thing? If so, what is your opinion please. Good value - or don't waste your time?
Hope it's ok to ask such a thing on this site.

Thanks in advance - Yiayia