Cheap Ebay roller rockers. Too good to be true?

mopowers said

Inspect the bushings very closely. I had one that needed to be replaced out of the box. Also, when you mount them up, make sure to check that the rollers are square to the top of valve stem. I've heard some have issues with that, Luckily, mine didn't.

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Ran out of time to check diameter on all of them but the couple I tried seemed to fit the shaft correctly. I did run a tap through the adjuster threads to clean them up. Then I cleared the oiling holes with a piece of welding rod. Some of them are plugged with grit/shavings from the factory so make sure you check that. I ran them in the ultrasonic tank to clear all the manufacturing debris. They definitely need a good cleaning before use. Got to figure out how to clean inside the shafts when I get home.