First off, it would be nice if you told us EXACTLY WHAT you are thinking of buying for 690.

Secondly, 690 WHAT? Dollars, Euros, Pound Sterling, Rupees, etc.

The devil is ALWAYS in the details.

Do a search, this has been answered maybe 20 times in the last couple of days.

The question is, How much is it worth to you? Obviously the longer you hold off the cheaper the device is going to be. But at what price? Early adopters pay full price, people buying a 1 or 2 year old phone pay more than the one that buys a 3 year old phone. It’s all up to what you’re willing to spend.