Vinyl has appreciated in value recently because new vinyl played on a good turntable with a good amplifier and cartridge sounds much, much,
much better than a CD played on the same system. CDs are simply limited by the sample rate and sound depth chosen as the format standard - they're below the quality of what the human ear can detect, and so good analogue sound like that on a properly-cared-for vinyl record simply captures much more detail than CDs do (and, it goes without saying, far, far,
far more than MP3s do).
Also, most CDs are these days mastered like
. A lot of record companies brickwall the dynamics on their CDs to hell, which makes the drums in particular sound horrendously unnatural and flat, but since dynamic range compression is a digital process and most vinyl records are mastered from analogue master tapes, far fewer of them are burdened with that limitation, which only increases the value of the format to audiophiles.
Properly mastered DVD-audio could probably match vinyl in sound quality, but far less music gets released on DVD-audio than on vinyl, and some of it's still mastered like
due to the aforementioned volume compression anyway. (I've always wondered why that was, incidentally; you're selling the damn products to audiophiles as it is, who aren't going to want a product that sounds unnatural, so why the hell don't you give them what they want? Record company executives can be idiots a lot of the time).
VHS doesn't have any advantages over DVDs or Blu-Ray. The picture quality is
, and the sound quality isn't that great either. It's not worth throwing them away really, because even if you aren't keeping your VHS player you can still sell them for a presumably modest sum, but they're not superior to the dominant format in the market like vinyl is.
(It's worth pointing out that I only buy CDs if a vinyl edition of the same album is unavailable for a reasonable price)