Maybe they should block you then buy you. Probably would help them in the negotiation... But in all seriousness, PadMapper was a great service and seemed to do

Maybe they should block you then buy you. Probably would help them in the negotiation... But in all seriousness, PadMapper was a great service and seemed to do it the "right" way (providing deep links back into Craigslist's site/content), if there is a "right way" to unofficially gather data without use of a public API.