I watched the Shop HQ shows and I was extremely tempted, but I just sold a few small gold diamond hoops this year because I had too many to wear!
Lord and Taylor used to sell Morris & David a while back. They are pretty good quality natural, mined diamonds. That is the only kind of diamonds I purchase, as the diamond market is also getting flooded with lab-grown, and those stones have zero resale value.
I think the prices are fair, but IMO all gold and diamond jewelry is vastly overpriced these days on the retail market. Anything you try to resell will come in well under purchase price, so make you really want it, and will wear it!
Yes, I really only purchase at Shop HQ when I have the coupon as well.
I have decided to try to purchase fine jewelry only if I love it, not just if I like it...