Though I understand the situation and the fact that you must be very upset about the overnight price jump, this is really a common practice, especially with online sales.
Prices are always subject to change, whether or not they are a part of an advertised sale or not. All online retailers change prices on a daily, hourly, or by-the-minute. Sometimes you get lucky, sometimes you don't.
Most of the time, prices drop over time -- especially with electronics and software (games, movies). The up side is that if you wait, your laptop will likely drop back down in price to what it was before, or even lower. They all eventually will.
I cannot explain what happened in your case and why it jumped up. I know that it is sometimes common for a retailer to have a certain price when inventory is above a certain threshold. Once that threshold is crossed (for example, there are only 10 left of a product), another price kicks in immediately. This could be what happened in your experience.
Other times, when a certain time has passed, the price automatically jumps. Or sometimes the original price was in error, and was never intended as a customer-visible price.
I know that when LORD OF THE RINGS was released on Blu-ray, I ordered it on Future Shop for $18.99 when it was retailing for $69.99 everywhere else. Future Shop sent me an email saying that their online price was in error, but still honoured the order that I had placed.
When you see things at a good price -- especially on the Internet -- it's best to grab it right away and worry about it later. Especially with Future Shop, you can always return your product later if you don't open it, but you don't always get a second chance to order it in the first place.
