Shit I have been shaving since 1992, at that time it use to take 4 razors\shavers. Technology has sure caught up Go to a CVS if you have one and buy The male shavers. CVS shavers are rated no.1 With consumer reports.
If I shave every 4-5 days I can get away with 1 razor. For the absolute best shave go for the Gillette top of the line 5 blade razor, it will set you back $25-30 per 5 depending on where you live. Always exfoliate before shaving and use a quality gel, for me it is Noxzema or Nivea.
>>Edit<< this is only for upper body as far as lower usually every other week.<<<