jQuery Price Countdown in relation to dates
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Sadly I'm not a jQuery/JavaScript guru and I'm stumped with a problem.

In short, there's going to be an event where the price of a few fixed items goes down by the minute between two dates. 

For example:

2012 07 25 - $1500 -> 2012 08 01 - $1000

And my problem is I don't even know where to start with making this a real-time countdown. Only the price is needed to appear. Any help, pointers, alternatives would be a great help.