2004 Suzuki Katana

A 30k-mile 2004 Katana 600 for $700 is basically free money if you can turn a wrench—Suzuki's retro sportster is bulletproof once the carbs are cleaned, and you're looking at a genuinely fun middleweight that'll never depreciate further. This is the bike that proves "needs carb cleaning" is dealer code for "steal."