Android 0days at this point are so numerous, I find they are relatively worthless compared to time invested elsewhere. Other people seem to have the same experience (i've seen offers of double that amount for iOS remotes): http://blogs-images.forbes.com/andygreenberg/files/2012/11/e...
Android vulnerabilities aren't more numerous than iOS vulnerabilities. The key difference is that 97% of Android devices do not get security updates. There is no need for 0 day vulnerabilities for attackers, in general. Few users have Nexus devices.
