If you model HO, check out the HOYARDSALE group on Yahoo. There's one for N scale (NScaleYardSale), and probably other scales as well.
Nelson
Ex-Southern 385 Being Hoisted
UPbid.net is starting to gain some ground. It is still small however. There are no listing fees.
Question: Is there a model train version/equivalent of RCU anywhere out there? Specifically buying/selling/trading used train stuff.
Thanks.