SMF trader system is something like a feedback system and i believe it doesn't have the features for having an auction mod in your site.
I'm really interested in having such a mod like the phpauction. Where people can
- post their own items
- starting bid amount
- buy now amount
- end date of bidding
it would be best if you can have to categories... 1 is the Items for Sale/Auction category and the Looking For Items category... well, I'm no programmer and am such a "noob" with smf as well. I just hope someone could at least create a mod something or similar to phpauction

Yea I too was thinking about PHP Auction, and maybe their could be some kind of bridge connection or something (something similar to the Joomla-SMF bridge), but integrated into the SMF forum. I guess though an auction mod hasn't been worked on yet for SMF.