I've been in that situation, not really "needing* anything, hardware-wise, for a couple years now -- although if anyone started making Achilles clones again, I'd probably buy about 10 of 'em.
I do buy an atomizer now and then, if I see one that seems to suit my very peculiar style of vaping... and I buy a new mod, or maybe 2, about yearly... just because of the horrible "shit happens" problem with vape gear -- and that's really the only reason I have about 20 of 'em, or more, hell I don't even know anymore.
A great many of mine don't even leave the drawer anymore; the ones I use regularly, rotating them around, are all my Minibooks (red, black, and 2 white), and my 2 Aegis mods. The minibooks are BY FAR my favorite mods of any I've ever bought... and I really like both the hand-feel, and the sturdiness (shock-proof is a great thing for a terrible klutz who drops things CONSTANTLY) of the Aegis mods; the 26650 batteries are also very good, though I don't think I get QUITE the battery-life from those, in my Aegis's, as I do from my 30Q's in my Minibooks -- I think the Minibooks must just be INCREDIBLY efficient in energy use.
So other than those increasingly-rare hardware purchases, the only vapey stuff I buy anymore is DIY related: staying topped-up on PG/VG, making sure I keep at least 3 liters of nicotine in the freezer, keeping my regular flavors topped up.... and now and then buying a few new flavors for some new recipe I want to try.
For a tightwad like me, vaping is AWESOME.
Andria