I decided to flip my D9 on eBay. After reading, "The State of Cryptocurrency Mining" by David Vorick, and seeing my other miners have yet to ROI, and probably won't, I'm finding this game to be ridiculous.
Was it profitable to flip?
Yes it was actually. I don't want to give too much information, but I mined for a week, and then sold the miner for more than what I paid.