Begging the question, of course, of whether it's best to get a Lumia 520 that's older and cheaper, or a new 630 that's newer, more expensive and yet with both devices on exactly the same OS version? There are pros and cons for each, but see my review of the 630 for a few pointers either way. (Plus my comparison of the 630 with the 625.)
The 530's PAYG price in the USA was under $40 this week, under a special offer - -simply astonishing for a smartphone with this much power, relatively speaking, with worldwide satnav, a decentish camera, capable of playing most games, and so on. The cheapest in the UK as I write this is £65, but I've seen it below £60 in the past.
And now with Lumia Cyan on (here's our summary of what's in it), there's all the benefits that this brings to the UI.