My guess is that once they've established a price tolerance, they're not going to back off that price. They seem to have increases often, and I believe it serves several purposes for them (aside from the obvious of making more money) - to maintain the illusion of exclusivity, and to push those on the fence to go ahead and buy what they're considering in order to avoid the price increase. News of these prices increases always seems to leak out a few weeks ahead of time.
Three years ago I had Tiffany bring in a ring that was small diamonds/gold/platinum, in a sort of vine-y design. I had fallen in love with it on their site. It was $8k if I remember correctly. When I saw it in person, I was very underwhelmed, and there's no way that ring was worth $8k, even at Tiffany's prices. It was ridiculously lightweight. I just checked the site and now that ring is $10,500. They just don't stop with their increases. They also have a first-rate photographer for their product shots on their site - the items I like on the site never live up to my expectations when I see them 'in person'.