Reply to Which CDJ for a "high-end noob"?

Hi all,

Looking for my first CDJ's. A little about me:

Late 1990's San Francisco rave scene. Used to bedroom DJ on 1200's. I rarely touched them after about 2004. Lot's has changed since then obviously.

That said, I'm the type who likes to make "sound" purchases. If I'm going to spin vinyl and it's 1999, MK2's and a Rane mixer. I'll buy the 909 instead of the software synth if you know what I mean.

Much of this is obviously out of wanting good gear. The other half (yes, almost half) is that I like to buy things that have value/demand as a sort of industry-standard, making it easier to one day resell.

So that said, I know there's oodles of CDJ's out there. I figure stick with Pioneer. Beyond that, can anyone give me a crash course on the different generations? I see MK2, MK3, etc. It would be awesome to even get a breakdown of the evolution: "from 2000-2005 the CDJ XXX was king. Then more digital effects were added, blinky lights, laptop sync etc, so from 2006-2012 the CDJ XXXX and XXXX have reigned."

I like this because I figure I don't need anything crazy from the last few years as they all seem to be about digital tie-in etc. While this would be nice, I figure I should get comfortable with CDJ's in general, perhaps using one from the earlier generations that led initial charge from vinyl...but like, the one that the clubs would have used, if that makes sense

I figure I'll start out using my existing Rane MP22z mixer.

TLDR:what have been the industry-standard CDJ's for the last decade? And which would be a solid buy to use for a year, then sell for more or less the same amount due to having a solid legacy?