Wrong Alternator?

Mattax, good morning!
The alternator I got was definitely bead blasted or somehow chemically cleaned. Don't know how much efforts they put into the rebuild, but I guess for $55 + $18 core charge, I can not expect a product that lasts 10 years. Would prefer to pay $300 instead and have something really reliable. In the end that would be cheaper and better for my nerves.

Cheers, Wolfgang