roller rockers ?

I've seen Shannon's on E-bay. Didn't see any for $149 but did see some stainless ones for around $200. They had shafts with them and were 1.6 ratio. They looked nice and had bronze bushings but I'm very leery of the "cheep" rocker sets. I had one set awhile back and the rockers almost rolled off the valve tip at full lift. Geometry was terrible even though they looked real nice. Don't know what brand they were though as they had no markings on them. I was told they were Comp when I bought them or I wouldn't have bought them.