Since February we have seen massive price drops on pretty much all SSDs regardless of manufacturer, capacity and performance. My own example was on a purchase of a Corsair Force 3 120GB SSD which I purchased for £120 in March and just a few months on, it is available at the same store for just £80!
I'm by no means an analyst nor can I professionally judge what SSD and HDD prices will be like in the future, however I can give it a go. On the right are my predictions for prices of SSDs and HDDs.
Please note that the bottom axis is meant to represent pounds (£) not pence.