A few years ago, I saw a copy of Quarantine for only $20. Sadly I never picked it up and the store in question shut down.

How about you guys?

...Well, i got all 4 IMOQ games for $80, so you could say i got each one for $20 XD But by that time, i only wanted Outbreak as i had already bought the other 3 (for prices ranging from $20-50)...but the guy refused to sell them separatedly and i refused to look for Outbreak somewhere else ._.' I later sold the other extra 3 for $30 >3>

Though i think the lowest i've seen them is somewhere on the internet at $20 or $30 for all 4 games (plus shipping and all...but the games themselves are that much)...so that'd be like $5 per game!! XD As of the lowest price i've seen on a single game, that would be $20 as well.

IIRC, I've bought Infection, Mutation and Quarantine for R$20 each, and Outbreak for R$25 '-'
The guy was about to dump them cuz no one seemed to buy it (the price for these games was R$70 each when I first saw them, two weeks before I bought them).

I bought 2 of mine used a few years ago for 16USD.

I remember back when I was in 5th-6th grade... we were in a Target in Wellington
and Infection caught my mom's eye (since it was in the clearance bin lol) and said why not try get this.
I said whatever and when we got back home and I started playing I fell in love.
I think we got it for 10 bucks so that was a plus, I found Quarantine for 20, while looking for the others, first then I found Mutation and Outbreak at the same time so I got them with my christmas money lol
Now I'm a senior in high school still enjoying these games, some of the best money spent ever.

Seeing as how I got into .hack Infection when I was about 6, I don't remember much, I think it was 30$, Mutation was 20$, Outbreak was 40$, and Quarantine was 35$