A few days ago the Collector's Edition went up for sale again on Amazon. A few hours after that post went live it was sold out again. Today the CE is back on sale. This time the price has nearly doubled, and is being sold through Amazon for the site Hubbagames.
As it stands, you can get the Collector's Edition for $129.79 right now. That's up $59.80 from what you could get it for a few days ago. The price hike can easily be contributed to the demand for the Collector's Edition.
Wrath of the Lich King will be released next week at 12:01 a.m. on Thursday, November 13th. Amazon and other online retailers are "guaranteeing" that they'll deliver Wrath to you during the day of the 13th.
The regular edition of Wrath is going for $39.99. We have previously covered the contents of the Collector's Edition.
Edit: You can also order the Collector's Edition online at Walmart at the price of $69.82, however your mileage may vary.