The one in the first link appears to have been sold for that 16 key price.

The person offering the 3 Salvaged #40 crates in the third link also did so for the last one (and had his own trade open at one point, but later closed it without success), but he got hidden by the trade owner. This might mean that the trade owner could be looking for better offers. However, it appears that he (the offering party) did get an offer accepted on this trade:

http://www.tf2outpost.com/trade/9091026

A confirmed offer acceptence, but it was for a Noir with black paint, which would subtract 2.5 keys from the total to make it anywhere from 14.5-16 keys (depending on how much the crates are valued at).

So a ceiling above 16 keys is at the very least plausible, though it's going to take a completed sale from a seperate trade to really make it some valid proof. To be fair, though, considering the unusual market is the unusual market and there is some room for error, I'll give it the benefit of the doubt and give you an upvote.