Old HP / Agilent / Keysight (aka HPAK) stuff does show up on Ebay for decent prices from time to time, so long as you don't need the specs of the latest and newest gear. And hobbyists usually don't. Personally all of the "purchased new" test equipment in my home lab is Rigol, and almost all of the "purchased used" is HPAK. It makes a nice balance.

Now to score one of those HP 3458A's one of these days...