Trading baseball, football, and basketball cards?

I am trying to find a website where I can find people like myself who want to trade(swap) common cards. My problem is that I have many cards from the early 1990's, but have no complete sets. I know it is more valueable to have complete sets. But often I have 3, 4, or 5 of the same card and missing other cards to complete the set. I am hoping that there is a website out there where people can list the cards that they are willing to trade(such as my "extra" cards), and list the cards they want. I dont want to have to go to a store to buy the cards to complete my sets. I dont want to go to a store to trade either, as they will not give me fair value for my cards. Been there and done that. And please do not tell me to go to EBay... because Im sure I will get 100 answers that says "go to EBay." Obvioulsy I have tried searching with yahoo and google also, and can not find such a website that has what I am looking for... which is why I am trying this.