Up until a couple of years ago, sports betting, to me, meant fixed-odds betting against the bookmakers - and that's what I used to do. Usually betting on football, I'd choose my matches carefully, then place my bets with whichever of the bookies with whom I had an account was the best price. I'd never really given Betfair a serious try, usually because I liked doubling up matches to help improve my returns. Trading matches had never really been a serious consideration, usually because I'm usually either in the ground, or in the pub, when a match is in play.