Pros for Yahoo: it is cheaper than both and ! if you're selling anything under $10 it cost .05 to list and 2% of the selling price (an item selling for $10 will cost you 25 cents).

Cons against Yahoo: it doesn't get the amount of traffic that Ebay receives. Also, It isn’t run by member of the club like Jackpot Auctions (and they don't give away as much stuff).