Found this
Roland Bass Cube 30 (pre-owned w/o visible wear) for $99 after purchasing my first bass. I'm still liking it, especially for that price.
It's like having multiple pedals-built right in...
Alternatively, or in the meantime-you could do as many have, and find a cheapo 'used' guitar amp w/ headphone jack (cancels the speaker) and after plugging in the phones, plug in the bass, and hammer on! The bass would most likely
KILL a guitar amp speaker with anything above low, low volume.
-John