[DeFault User]

I too use my old Trac II razor from back in the 80s maybe. a ‘blade’ lasts me a month.

You're as cheap as I am. I use the Trac II and found blades on Amazon at $6.69 for 50. I note they're now up to about $9 and 100 blades will run you $14 or so.

It's not the original Gillette blade but a name brand:

Personna - Twin Pivot Plus (50 Blades/Order)

[GreyFriar]

I usually shave every other day, which helps them last a month, i.e. 15 shaves per ‘blade’.