Bicycle Classifieds
Free bicycle classified ads. Buy, sell or trade bicycles, parts and accessories.
http://www.bicycle-classifieds.com/

Bicycle Exchange's Free Classifieds
Categories include tandems, road bikes, dirt bikes, parts, carriers, and antiques.
http://www.bikexchange.com/classcur.htm

Club Velo
Classifieds for all types of bicycles.
http://www.clubvelo.com/

Hostel Shoppe Free Recumbent Classifieds
Buy or sell with recumbent bicycles.
http://www.hostelshoppe.com/recumbent_classifieds.php

Preloved Cycling
UK and Ireland site for buying or selling a second hand bicycle.
http://www.preloved.co.uk/go/cycling/

REAL Mountain Bikes
Mountain bike classifieds featuring bikes and parts.
http://www.realmtb.com/

The Bicycle Planet
Buy or sell just about anything bicycle related.
http://thebicycleplanet.com/classifieds/index.cfm

The Bicycle Trader
buy, sell and trade with newspaper and on-line classifieds
http://www.bicycletrader.com/

The Bike Classifieds
Free road bicycle and mountain bike classified and ads.
http://www.thebikeclassifieds.com

Total Bike
Free bicycle photo classifieds. Browse or place a free ad.
http://www.totalbike.com/classifieds

Trade a Bike
Buy, sell or trade just about anything bicycle related.
http://www.tradeabike.com/

United Bicycle Institute
Buy and sell used cycling equipment.
http://www.bikeschool.com/classifieds/