As a starting value - $7k is ballpark of the average amount spent on an engagement ring. However, of course you can adjust to your own budget. On your second q

As a starting value - $7k is ballpark of the average amount spent on an engagement ring. However, of course you can adjust to your own budget. On your second question - yes - we have good data that the pricing is not efficient. In reasonably large budget ranges there can be a 'great deal' at the cheaper end which is the best buy. There may be bigger diamonds but they will be lower quality. That particular diamond was recently reduced in price and just sold. It will disappear from our rankings shortly.