What Delinquent said. They degenerate about 99.99% of the time into, "well MY source sells them for"
Now I didn't lock it, but I would have...
And to try and answer you orginal question about the Jets, I'm thinking that as they have become more popular, the suppliers are able to order in bulk and get better pricing which they inturn pass on to the guys only buying ones and twos....
But I'd make a mental note of this as it's usually a signal that availability will become an issue - which will result in price increase as production often lags a good bit.
But I don't really know about such things.....