Try Shavekit Razor For £1 including P&P costs

You can get a free 3 blade razor, handle and replacement cartridge for only £1 from Shavekit. Just head over to their website and fill in the form with your postal address and choose the kit you want and get it delivered to you for only £1.

I have tried this before, cancel it after the first box came then they sent loads of emails trying to get me to subscribe again. in the end, I only paid for the £1, and got a 3 blade box and 2 5 blade boxes for free! Just be patient with the emails they send, it usually takes about a week for the first one to turn up.