Bikes are relatively simple machines. Which means: unless they're totally rusted a rotted out, they don't really "go bad," and any old bike - either a forgotten one in your garage or a find at the secondhand store - can be lubed up and become ready to ride.
Except, of course, for the frame color. But that's no matter, cause you can easily give it a fresh coat yourself.
Taking your bike for a paint job can be pricey, sometimes more than $100 depending on the color (and season, usually summer can be more expensive as they are busier).
No need to spend extra money when you have a tutorial like this one by We Can Make Anything. You can use the money you saved to get you a new helmet or perhaps a new lock...or a beer.
It may seem scary at first to disassemble your bike, but as the tutorial shows, simply take a few photos with your phone so you remember where everything goes. Easy. You can label smaller things in case you can't figure it out (use a little tape and sharpie to make them).
Best of all, by the end of this project you'll have a customized bike with shiny new colour that will protect it from the elements for months to come.
Get the full scoop on We Can Make Anything: Paint a Bike Tutorial