HDD prices have been creeping up for a while now. I noticed this as I was looking to add more storage to my server, checked prices late last year, figured I'd hold off a bit longer, checked again a few weeks ago and they were much higher across the board. Also a lot less stock for higher capacities. Took the plunge, bought enough storage to get me through the next few years.

Glad I did as the drives I bought have continued going up in price. This article just confirms it for me.