I didn't get onto wow once this past 4th of July weekend, however, I bet that I can tell you exactly what the market looked like.
Perhaps a picture will be more powerful than my own words:
Weekends are normally violent in terms of price fluctuations, but JULY 4TH is possibly the most violent in terms of how low the prices can get. This weekend was probably your best buying oppurtunity for the upcoming patch. If you saw titanium ore at crazy low prices I hope that you bought them out if nothing more than to resell them in the upcoming weeks.
I want to apologize for sharing this information *cough* a little late *cough* but I had no internet access the whole weekend and thus no way to get the word out. I'm sure that the few of you that did take advantage of the prices this weekend are somewhat greatful that I didn't get the word out.
On the plus side for some servers there may still be great prices to be had. Remember that prices will eventually climb back to pre-4th of July numbers so be on the look out for uninformed auctioneers continuing to sell their goods based on this weekend's numbers.
Expect prices to be near normal by next wednessday.