No multiple tradelists. One topic per user. If you haven't posted in your tradelist in a long time, you can make a new one. However, creating new TL's every 1 or 2 weeks is not acceptable. There's no need for "single purpose TL's - if there are new things FT/FS/WTB, please add them to the existing TL. Repeated violation of this rule will result in loss of Trading Forum privileges.
Alphas/Betas for games. Most TOS's/EULA's for the beta say that the beta discs can't be sold/given away, during the beta or after the beta has expired. Depends on the terms of the EULA/TOS for the beta, though if planning to sell/trade them on CAG, please provide a copy of the EULA/TOS that explains thet can be sold. Without that proof, betas can't be sold.