They set the retail price for the safety razor at $78!!! I'm pretty sure that for $78 in the store you'll get razors included, but the rep-rap certainly won't print any.
They're probably talking about actual, old-fashioned double-edge safety razors, not a Gillette Mach 3 Turbo or whatever. And yes, a very nice one can cost $78 and does not come with blades. The $78 razor would also be a heck of a lot nicer and shave a lot better than anything you could print, and would last for decades. I use one, and it's older than I am. I didn't pay anywhere near $78 for it. More like $10.