I'm seriously considering a prepaid Galaxy S2 4G - but those are different than the Nexus, no? Do they have Nexi that work on the Sprint network?
Those aren't stock android but you could unlock the bootloader, root, and install a custom ROM.
Galaxy Nexus is on Sprint and apparently on sale for one penny.
http://www.sprint.com/landings/galaxy-nexus-4g-lte/index.html
