I still have a pack of ST-301's left from my first 100 blade purchase some years ago. They were reasonable in price, and didI like the Prime Platinum STP301 a lot, and they are really cheap. I bought 600 of them for about 9 cents a blade and free shipping directly from DORCO USA.
a good job while I was learning technique in vintage TTO razors.
My latest 100 lot purchase was 7 o'clock greens, shipped from India for $8.10. In the current design razors I use now, Dorco PL602
and Baili 171, they are shaving nirvana for me.