Doom isn't overrated. He goes for the price he deserves. The Weta Balrog goes for way more but you don't hear anyone naysaying that one- or how about the Alien 1:1 bust or the Predator lifesize bust, those go for around 2.5k or higher. I hope Doom fetches more bling in the near future.
I'm not saying that this is overrated, AT ALL. It's an amazing piece. One of the best. And I think he deserves about $1000-$1400. But edging upwards towards $2K is getting kinda ridiculous.... I guess from a buyers standpoint