A few online retailers have already posted prices on several of the devices revealed at this years' MWC.
Keep in mind that most of these are pre-orders, which means that you likely won't be getting your device right away.
Nokia's new smartphones, the Lumia 520 (http://www.gsmarena.com/nokia_lumia_520-5322.php) and Lumia 720 (http://www.gsmarena.com/nokia_lumia_720-5321.php), are available for pre-order for (http://www.notebooksbilliger.de/nokia+lumia+520+schwarz/eqsqid/1def3c99-83c3-4fa6-a08e-2b92092247ca)