I trade at these sites for the most part
The Bench: http://www.thebenchtrading.com/
Trading Bases: http://groups.yahoo.com/group/Tradingbases/
Dugout Traders: http://dugouttraders.tripod.com/
Sports Card Fun: http://www.sportscardfun.com/default.aspx
Card Collectors World: http://community.cardboardconnection.com/
Sports Card Forum: http://www.sportscardforum.com/

I have done a "Bad Trader" list so it only fair to do a "Good Traders" list. 
The purpose for this is for me to keep track of those I have made many successful trades with and for you to have an idea of who, if treated fairly, will treat YOU fairly.

GOOD TRADERS LIST
I highly recommend trading with these fine people:

* Traders whom I trust and can send cards unannounced. Many trades.  Keeps me in mind
         when obtaining Mets cards.
*  Many successful trades, not afraid to go in debt or owe cards to.
*    Great People, Many trades without problems.  Quick and easy delivery.
...in no particular order:

THE A-TEAM
*  "hatesgoats" Bill Organ-  The Man! Congrats to your Cubbies!
*  Kevin Martens-
*  "Rotorob" Robert Fuller  
*  Ron Brown-
*   Stu Gash- 
*   Milo Grummons-
*   Billy-  Bill Y. at The Bench
*   potvin48- The Bench
*   MITCHIEHO-  The Bench
*   dp33- The Bench
*   LEONOFNJ- The Bench
*   camcal8- The Bench
*   mdhollenbergs- The Bench
*   Scobes- The Bench
*   redsoxnation1-  The Bench
*   bowhunter3070-
*  fatrat John Malusis-  The Bench, Trading Bases(TB)
*  bonfitto31- The Bench
*  mesellucards- Thanks Scott!
*  Greg Armentrout- Trading Bases (TB)
*  Marvin Boos- Trading Bases
*  Jack Downs- Trading Bases
*  Kelly Glazer- Trading Bases
*  Greg Konkoff- Trading Bases
*  Jay McCarthy-  Trading Bases
*  Bob Novy- Trading Bases- Yanks
*  Ray Schneider- Trading Bases- Cardinals
*  Damian "D-Man" Varga- Trading Bases  R.I.P. D-Man!
*  Quincy Wong- Trading Bases
*  Mark Gilmore-Trading Bases . I've lost count to who owes who yet we keep sending!!  LOL!
*  Mark Talbot- Trading Bases
*  David Corliss- Trading Bases-  He NEVER gives in!  A Met digger!!!
*  Jack Dworetzky- Trading Bases- Leaders
*  Matt Schultz- Trading Bases- Rangers
*  Vaughn Kastor- Trading Bases- O's
*  Michael Molek- Trading Bases- Injuns/Pirates
*  Mike Keleman- Trading Bases
*  David Corliss- Trading Bases
*  Cliff Summar- Trading Bases
*  Duane Jackson- The Bench.  Send him your Rays cards.
*  Trish Petty- The Bench (Orioles and Yanks for her friend Kathy)
*  Melissa Beck-Cox- always digging for Mets- The Bench-  She needs your Brett's (Brettfan) and Cubs
*  Michael Salinsky- Trading Bases
*  Doug Flater- Trading Bases
*  Michael Molek- Trading Bases
*  Ed Lohr-  Trading Bases- went out-of-his-way digging and found some tough Mets for me.   
*  Tom Kraft- The Bench
*  David Kimura- The Bench
*  Corey Urban- The Bench
*  Jeff Levitsky- Trading Bases, Bosox
.