I find these threads slightly strange.
Essentially people are saying “I want a genuine Omega but I dont have the experience to authenticate one myself.
Equally, I aren’t prepared to pay the premium it costs to buy a new one from a boutique or a used one from a reputable bricks and mortar store, so I’ll buy one from a lesser know seller than costs less, then take it one of the former establishments and ask them to authenticate it for free, so I get the best of both worlds”.
Then people wonder why sales staff who are on commission are slightly off with them.