The current publish 81 on the Test Center doesn't reiterate the duper vendor feature, it only mentions the weapon/armor/combat changes. However if it will have this new feature, you are definitely right. I would like a poll on how many would care if what they buy is duped or not? How much should it effect the price (in percentages)? Also I'd like a poll on what people anticipate the number of dupe rares are out there will be, what percentage of your famous list is all duped. Last who will this benefit most? I believe its the cash only websites since they can sell what vendors can not.
I for one am not too concerned if an item has been duped in the past -- as long as it's common knowledge that it has been duped. E.g., we all know the two-story talking statue has been massively duped, but I still like the graphic and own one. I factor the fact that there could be hundreds or thousands of statues sitting in a chest somewhere waiting to flood the market at any time. This is always factored in to my purchase/sale of items. What I am concerned about is finding out items potentially have been duped that I otherwise thought were very scarce or unique. E.g. It's a little unsettling seeing two Sphynx statues being sold in the last month. My initial thought is that there were always two and someone didn't report getting one from Mesanna. But It makes me nervous bidding on such a high ticket item, as I risk the chance that it was duped at some point. Also, I should just clarify that this is complete speculation, and by no means am I implicating anyone as duping or knowingly selling a duped item.
So, no I don't care if it's duped and, say, pre-season 9.
Yes, I care if it's duped and a more recent item, indicating that duping is still happening.
Yes, it will impact my buying/selling decisions and negotiations
I just hope that when I start to put items on my vendor, they aren't all dupes. That would make me really depressed.