It's the classic scenario - hip, young (particularly indie-oriented) bands get what gear they can cheaply. The real old stuff people like us have and are prepared to pay well for.
Then there's all the "unpopular" stuff like concert toms which they can get much cheaper. Get half a dozen of these indie guys getting national TV appearances and hey presto, it's a trend.
Same with vintage clothes, furniture etc. It's out of fashion until enough people start using it again - then it's in fashion. Love it.