If you could make a profit I'd say go for it, there';s plenty to play elsewhere and games like Quantum Break, Infamous, Titanfall and Destiny won't be out for a few more months, by then the consoles will be readily available. Hell I wouldn't be surprised if they were available on Black Friday.
It probably wont be difficult to get one this month, but once stock runs out, and maybe early mind December, I doubt Sony will be making them fast enough to meet demand. At that point I can easily see both consoles going for over $1000. Its just my guess though.
It's a pretty smart move, not like there's shit to play at launch for either console anyway. Only thing is I think I've read that the 2 consoles will be pretty well stocked this time around, so it will be harder to sell it for a lot.