Other than my Bianchi road bike which was bought new, all my bikes are heavily made up from forum bargains.
Some of the best bargains:
– Rocky Mountain Element full susser – frame for £60, wheels £100 (Hope Pro2, DT), seatpost, cranks, shifters, bars, stem, brakes all also from the classifieds
– Cross Bike – everything other than the frame and fork is from the classifieds
– Single speed (853 SS specific inbred) – all from classifieds other than saddle, brakes, bars and tyres
– Kona Kilauea – all from classifieds over the years other than frame, seatpost, saddle, stem and brakes
Saved me an absolute fortune – some stuff I always get new (chains, cassettes especially) but the rest is usually just as good if used and I’ve had very few instances of classifieds parts being overly tired even when the cosmetic condition hasn’t been great.