Oster 76 Blades?

I get that Oster 76 clippers are real nice professional clippers. So I ordered one. I knew it didn't come with blades, which was fine, I'd buy them later. Ok I got the 76, thing feels great, much better than what I had before. But now I started shopping for the blades and....wow they're expensive, at least $25 or so per blade. Maybe I just haven't found the right store to buy them from, but am I stuck paying prices like this or is there another option? Thanks so much. I'll pony up if I have to but I never dreamed these prices would be so high for the blades. Shame on me for not looking into this earlier. I'd like a variety of blade sizes so that I can learn as I go along.