I buy daily dispossibles in bulk, 90 pairs at once, lasts me about 6 months (maybe slightly less) and costs about £65. As previously mentioned, you need to have a checkup every year (I think) and they won't sell you any unless you're up-to-date with that. I still wear glasses (not at the same time, obviously) and only use the lenses for playing football and when I'm on a night out.