I still use the old double sided drop in blades. The blades work out to 10p each and last at least two shaves (ie about 2 months).
I can't use electric or gazillion blade options because I shave so infrequently. I do however use the King Of Shaves non foaming gel. I find that it doesn't suck the moisture out of my skin. I used to buy their 15ml bottles of oil, but it took longer to clean the basin.