Some of my more recent flips:

Raleigh Technium. paid $25, sold for $270


Bridgestone MB-5. trash picked, sold for $95 with some nearly new slicks.


Sekai something or other. Paid $15, sold for $125.


Novara Strada. Paid $20, sold for $190.


I didn't have to do anything to any of these bikes besides fix a flat! The Bridgestone was sold as a project and still needed some work. The Raleigh and the Novara have probably been my best flips but I have sold tons of trash picked bikes and framesets for over $100 without putting any money into them.