I don't necessarily regret buying this, but I do regret buying my PS4 so early. I got it around launch time for $320 and since then, I've barely touched it. I knew I would be getting one eventually and thought it was a great deal even though there was nothing on the system that I wanted at the time. There are plenty of games coming in the future that I want to play for it, but if I would have waited I could've bought it for less.
The rumours about the PS4K are making things even worse now.