Alert if the price changes within a few minutes of the window being open

[Machou]

I ran a scan with Collectionator, and I got this list:

Then I had to go AFK for 5 minutes, and the first item was purchased in the meantime. When I tried to buy it, there was no alert, no update, and Collectionator offered me the second item, which was significantly more expensive—it was 64,444 Gold instead of 699 Gold.

So, here is my request: Could you please add a verification, perhaps if the window is left open too long, or an alert if the price changes in the interim? Any notification that warns us if the price changes would be helpful.

I didn't have enough gold in my bags; otherwise, I would have bought it without paying attention, and I would have been devastated afterward. x)