I practice a lot totally unplugged, I think you won't find a cheaper alternative.
That said I recently bought a brand new Boss Katana 110 Bass combo, mainly because of one function (to first give it a try and then assess) : the 1 Watt output power position to play at very very very low level with a decent sound : it's for my ears when they need to rest (Menière disease and tinnitus related to these not so frequent episodes these days), not the neighbours as we don't really have close ones.
Verdict: it sounds really really good at 1 Watt, has plenty of possibilities with it's integrated multi-fx, has a very good headphones preamp (more on that later), is quite light and is fantastic at full power, which made me sell my two AER's...
Everyone is offering his best headphones of choice, which is great, but you seem to forget that on cheap (and on most) amps the headphones out is relying on the cheapest opamp the builder could find and this means an awful sound through headphones.
That said @Amy Smith seems to have vanished like 99% of the time...