I was late to the internet party, and got a pre-owned 33.6k. I don't remember the brand, but I still have it stashed somewhere, just for the nostalgia. Had it in my desk drawer to muffle the sound a bit. I figured out later I could turn that off. But I needed the sound to hear if I got a successful connection. Since my mother was sceptical about the phone line being blocked, I was not allowed to use a modem at home initially. So I used it in the night, to avoid detection. I had planned to just use it for essential surfing and patch downloads for games. But the addiction was too severe. After one month had passed, I figured out the phone bill would not go unnoticed, so I had to confess. So we agreed that I could use it after ten in the evening, and I would pay the usage part of the phone bill. I think it was close to $100 a month usually. And that was even if I had free fast internet where I studied... I never have paid so much for internet after that.
It was probably rocket fuel for a really bad sleeping habit (or complete lack of sleep), but I would not trade those years of late night chatting, surfing, mud and usenet for anything.
Later before I moved out, I got a 56k internal modem. But it was so unstable at max speed, I just ran it at 33.6k.