It is a very interesting situation with DRC this year. I am not sure about other countries, but in the United States retailers who received allocations were required to sign a document stating they would not offer the wines for sale online under any circumstances.
2006 was the last vintage where I bought DRC at release (okay- at all), and the waiting lists were so long that I figured I would never get an offer again. But voila, along comes 2015- potentially one of those once in a lifetime vintages- and I was contacted by a few retailers asking if I was interested. That included everything, including RC, Montrachet and magnums of a couple of the “lesser” wines.
The asking prices were very high at first- in line with the Benchmark offering the OP noted- but a couple of persistent retailers have come back with lower numbers since, including Echezeaux for $899. I am ashamed to admit that was tempting for about 5 minutes until I stopped to think about it.
A friend ITB told me the invoice price was just slightly higher than 2014 for most of the wines BTW.
So right now it is a game of chicken- with that confidentiality clause taking a lot of transparency out of the marketplace.
I have not had time to check winesearcher daily, but I have noted RC bottles offered for $13K and $18K that disappeared same day. All other offers were $20K or higher. Winebid is a good spot to watch too- they have a steady trickle of 2015 DRCs on offer, and with the new sales history feature you can see recent results for any of the wines that happen to be on offer in a given week. Right now, for example, they have 2 bottles of Echezeaux on offer for $1,535 and one for $1,700- with a sales history of $1,700 in June and $1,615 in August.
For my part, I think actual sales results will be all over the map. I know retailers that still have waiting lists and allocate the wines by the bottle, and there are also retailers- good high end ones- where they are down to a customer or two at most and having a hard time selling the rest of their allocations by word of mouth. So some people are going to pay very high prices- but when the cash crunch comes I bet a few people will get some serious “bargains” (relatively speaking.)
The real question is how long this confidentiality thing can last. It may work in 2016 with the high quality and tiny yields (DRC’s Echezeaux supply was decimated for a start), but in 2017 and beyond I don’t see it being a workable tactic.