First of all, I'm with Clinton here. I hate pushy companies. But here is the other side of the coin. I often do follow up calls on customers, who I suspect went with a competitor's offering, only to discover that the initial price which my competitors quoted over the phone / email has now more than doubled! Needless to day, they are not happy about this and are very willing to switch over. I've won loads of new business this way. Interesting, a lot of these are not switching over on a primarily monetary motive but simply because they feel cheated and conned by bait and switch tactics. I ONLY discover this by doing a follow up call 7 to 10 days later. But aside from winning new business by following up, you also gain INVALUABLE market research. For example, I ask them in nice chatty tone "why did you decide to go with competitor X?" The answers give you more insight into your market than any commissioned 50K market research report. However, we only follow up in cases where the customer is of good quality. Bargain basement shoppers, coupon-clippers, Groupon users - no thanks, not worth the hassle.