Advantages and Disadvantages to all of them, to each their own kinda thing. Being I mostly only collect Hockey anymore, CnC would be in my list (but I don't even frequent 5 Forums, never have and doubt I ever will, and actually I'm down to two here and CnC) as it is chock full of Hockey Collectors/Nuts. Just wish USPS hadn't made it harder to justify trading due to the cost of shipping out of the US (starts around $8 and goes up from there depending on weight).