You don't need a lot of money to get your hands on Android 5.0. You don't need a current device, either. The Nexus 4 and 2012 Nexus 7, despite being over two years old at this point, both get to taste Lollipop.
Picking up either of these devices is one of the more affordable ways to play around with Google's latest software. But Expansys USA is holding a blowout sale where it will let you digitally walk out with both devices for as low as $159.99.