Wow amazing how good their marketing is. You are willing to buy a what, 5% faster GPU for almost 2x the money. Not to mention it is going to be loud and hot since its reference cooler.
Judging by the specs, it should be around 10-15% faster than the GTX 1080 Ti stock for stock. And while I agree that it being restricted to the reference cooler is a negative, the reference cooler still doesn't limit overclockability. These GPUs are limited more by their TDP than by their cooling after all.
The main reason why the aftermarket GPUs outperform the reference clocked GPUs is because they can maintain their boost clocks much better using the stock fan profiles. But the reference clocked GPUs can do it as well, just at the expense of some increase fan speed. Anyway, it will be interesting to see how well the Titan Xp performs in my case. I have a 120mm fan pointing directly towards the fan from the bottom of my case, plus a bigger 250mm one from the side so that should help a lot I think.
Even if you sold it for $900, that is $300 lost. Do you think you wouldn't be able to sell a 1080 Ti for over $400?
I figure I will get about $500 even for my GTX 1080, so I'm actually paying $700 for my card. Then I have a Zotac Amp Extreme GTX 980 Ti I could also sell, for about $300. That's almost the entire cost of the Titan Xp right there.
But even if I didn't have this excess hardware to help pay for it, the cool factor of owning the fastest consumer GPU in the world is awesome. I wouldn't buy it if I couldn't afford it. I've spent more money on things that wouldn't bring me even a quarter of the excitement that this GPU will bring.
Besides, you guys should know by now that arguing with hardware enthusiasts about how much money they are spending is pointless. Value for my dollar isn't even a concern. If it was, then I'd be buying a GTX 1060 or something.