Then can you explain why there's concern at all about "grey market" gear? And how are others defining it?
In this area, the scuba industry is in the dark ages and sucks at times. Let's talk cars. If you bought a Chevy from someone who wasn't a Chevy dealer and took it to a Chevy dealer for warranty work they'd look at it and go 2 years old, 20,000 miles... yup, no problem. In the use, by law, they can't have restrictions like must have been original owner with proof of purchase from one of our authorized dealers and had all maintenance work done by one of our dealers.
In the dive industry, they aren't so enlightened. If you aren't the original owner or didn't purchase from an authorized dealer some manufacturers will refuse warranty work. It's not that the "grey market" dealers sell you any less quality gear, they just threaten the pricing monopoly that the manufacturers have in place.
Either plan ball or go with manufacturers who don't have these horrible customer no-service policies. You should be able to get a complete set of recreational o/w gear for <$1500 if you choose the right brands and products. We recently had someone post a shopping list that was up around $4000. This is crazy.