How to get Rich

Single easiest way imo is to make sure you have a solid clone-killer ready in time for the first couple walks. It does require a bit of luck of course in that you need to not miss those walks but if you can pull a few annis out of each of those (which is easy enough at that stage, assuming you're not missing the walk entirely), you can basically go from 0 to fully geared just from that with no randomness/risk as selling UNID is sufficient.

For a more stable and reliable way (i.e. no walk timing necessary), farm and sell full

Key sets. Not every build can really do that (well) without gear but for those who can, you can flip

Key sets for just silly amounts early on with next to 0 trading effort as buyers will happily join your trading game within seconds reliably at that stage. Plus you tend to get a bunch of

Mal and

Ist and the like along the way just off of countess. Solid other drops are entirely possible (and not unlikely to get at least a couple) but merely a bonus. Keys alone tend to get you from 0 to done quite quickly if you're on them straight away.

Once prices stabilize, if you then even still want to/need to do any more farming, just switch to whatever best suits your build and what's the most fun to you. More keys (albeit less rewarding than early on), CS runs,

Baal runs, TZs, trav, torch runs, ... whatever tickles your fancy. Just keep in mind that all of those "zone farms" (CS, TZs, ..) are very much luck dependent so once you shift to that, be prepared to see nothing of value for quite some time, only to then randomly stumble upon a griffs or a

Jah or whatever you eventually get lucky with.