Cheap build: f4 caffeine frame and headshok fresh from Mendon for 100$. Mavic crossmax slr, newish tires, salsa bar, seatpost and saddle for 200$. Rest of parts from parts bin for 0$. : r/cannondale
Sold - SOLD Cannondale Caffeine F4 Small 26er | Rotorburn
Cannondale F4 used in M | buycycle
BikePedia - Bicycle Value Guide
2009 Cannondale F4 Caffeine w/DL Ultra // Great Cond For Sale