All estimates of course. I think a buyer will try to convince you that they will not make much, and sellers will convince they will make more. I'm neither.
Given you paid $1,333 with shipping if in the US. You'll likely break even then earn some free money. If you sell it the buyer has to rip you off to make more than you or get ripped off and take a hit.
I think buy/selling mining equipment risky for both parties, but the more educated of the two will likely make out. So if you are on the board asking if you should sell, it's like jumping in the ocean with a large cut on your legs to see if there are sharks in the water.
I am not suggesting you cannot find someone that will make you a good deal, I just think you need to advance with caution.
Good luck.
I've been hitting up local folks who are trying to sell their ASIC miners at ridiculous prices. I give them a very good offer and even provide http://mining.thegenesisblock.com/ link with what they are trying to sell and show them ROI is not possible. After this there is usually no response, but at least I try. I'd love if someone could sell me something that will make me some money before the shit hits the fan in December.