Cheap Ebay roller rockers. Too good to be true?

Link worked for me.

I bought a set of PRW PQ's at a discounted price on eBay; very similar in construction: needle bearings and roller tips. The shafts did not last and were getting gouged out/fretted <1k miles. I 'think' it had plenty of oiling, excellent oil pressure all over the operating range, and the engine was not being revved much at all. Valve spring rates were just 1st level hi-po, nothing high at all. The shafts were probably not hardened properly, and based on the shipping address (which was PRW's address), they were either being sold 'out the back door' or were mixed 'seconds', with the shafts just pulled from who knows where.

So buyer beware.

I may retry the ones I bought with some hardened shafts from Mancini. But needles are problematic in rockers because:

• The hardness of the shaft need to be in the right range
• The needle sizing needs to be correct for them to last, especially with oscillating motions at small angles, which, from my reading, is a life reducer. The reversals tend to interrupt the oil film, leading to metal-to-metal contact.