The old scarcity deal.
"the doors close in an hour"
"we're almost sold out"
"hurry, my special bonus package is almost gone"
“the price is going up soon”
Anything look familiar? Yeah, and a thousand variations of that. There are some who set time or quantity on offers and enforce those limits. Often the limits are meaningless. One thing for sure the art of adding urgency to an offer works. As a seller, it's something that can and will increase sales . I'm just not a fan of fake deadlines and phony limits on quantities. So if you set a limit, mean it. If you say you are going to raise the price, raise it and leave it at the higher price. You come off as disingenuous if you do otherwise. If someone misses your great offer, they will take you seriously next time, and they will respect your integrity for saying what you mean and meaning what you say.
Starting to get the picture? Sure you are. You must never buy without thinking about it first. Better yet, think of some questions and ask them first. Gauge if you get good answers in a timely manner, or not. Weigh this in your decision.