IgnisDraconis said:
I just had a though - inspired by 80s-90s bikes. How would I go about getting one from this era, new preferably or old in good condition.
To get one new would probably be best accomplished with time travel...
Otherwise, the above responses contain good suggestions... also hit every bike shop you run across, I occasionally read in the forums of an old bike being picked up at a shop that has been just sitting there for years... Pretty rare, but you might find one.
Also, nice bikes will occasionally surface that someone bought new and rode a couple of times... someone just getting into cycling that decided it would be worth $2,000 to get a nice bike... and then losing interest faster than they gained it.
There is no magic, or people would have grabbed them all by now... Just keep your eyes and ears open, and let people know you are looking for an old bike so you maximize the number of people looking. Just be prepared to explain, "No, this Huffy isn't quite what I am looking for." But, do it politely so they keep looking for you.
There is no sure fire source, but there are several hit and miss ideas, and the more you check, the more likely you will stumble onto something nice.
And don't discount a bicycle because it isn't in great shape... It may be easier to fix up a bike that you want than to keep looking until you find one in perfect shape. If you find that C40 you want, in the wrong color, or with a dull or scraped finish, you can make it the right color and brand new looking for a couple of hundred dollars...
Thomas Edison said, "Opportunity is missed by most people because it is dressed in overalls and looks like work."