Other customers take lots of time. They ask for details on a half dozen issues. Then they're back a day or two later with more questions. You hear from them a week later with even more questions. Finally, just when you've decided this person is never going to buy, they place their order.
Experts divide customers in several distinct personality types.
There are headstrong leader types who are always moving forward. They tend to buy quickly. Others are very emotional. If it feels good, they do it. That type of person needs more time, nurturing, and may be turned off by a pressure sale.