I bought a handle from eBay for $1.50 shipped from China. The most expensive thing was the brush, which is (or, at least claims to be) badger hair. That was $12 shipped.
My understanding is that different blades suit different complexions. For example, the platinum blades I've tried are too sharp and irritated.
Get a sampler with a few dozen blades for $10-$15. Then get the blade you like for $20 for 100 blades.
https://twitter.com/mitchcohen/status/1476951534160257026