Some blades last longer. Some beards are coarser, some softer. That question is really YMMV, more than any other question. With a good lather after a shower, I can get 5-6 shaves from most blades. But a Derby? Two shaves max.
80 cents seems alot per blade. I am a newby myself, but I have seen 100 blades for about £10 ( gillette 7 oclock yellow and derby)Feather seem to be the most expensive I have seen, these run about £30 for 100.
This is the best price I have seen for 100 feathers: http://www.ebay.co.uk/itm/100-FEATH...630?pt=LH_DefaultDomain_0&hash=item58908b9456Feather seem to be the most expensive I have seen, these run about £30 for 100.