If you need to buy dev. kits, Arrow shows that they have 41 at $28.71 and Digikey now has 871 in stock as well for $33.60.
You can't see them if you follow the link provided for the related ST.com website, but if you go to Digikey .com dirrectly and search for STM32F429I-DISCO, then you can see the dev boards stock available.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.