Shit man I've been suffering from hearing loss for like 20 years (partially due to infections and the rest is listening to music with headphones at high volumes), and tinnitus for at least 12.
They oftentimes pop up on eBay (and sometimes Newgg) for fairly cheap. I've seen many older systems like that pop up for a couple hundred bucks with pretty good specs, even by today's standards.
Man I'm kinda glad I moved on from Ubuntu. I used to like it, but my interest fell a while back and I can't even really explain why.