I think I've laid -10000 or so on several occasions at Matchbook, maybe even a higher line. These games were pretty much 100% locks, top college football teams in the country beating up on the weakest D-1 teams with spread odds in the 30s or more. Never lost one of these, although I did lose a -5000 play on a highly rated Maryland team to beat Florida State at home in college basketball several years ago at 5dimes. Normally don't touch these anymore except in College Football.