The price is absurd, and that company seems to deal largely in forged material anyway. I'm sure there are many other better bets for Pine and Quinto signed photos out there - authentic and at much better prices. I'll see if I can find a few for you when I get a chance.
You could also ask Jason Thanos from www.hollywood-autographs.com. I know he just got autographs from several of the principle cast members at the premiere.
Skyline Signatures also appears to have gotten several Trek items signed recently.
I wouldn't trust the website seller antiquities Ca for the original item in question here. I find if you come across an item you are interested in, and if you are unsure about the authenticity, look for items throughout that website that are not interested in, but familiar with the signatures of those celebrity status individuals. If the signatures appear fake on others you are intentionally looking for, then there's a pretty good chance the original item you are inquiring about is a fake and/or the website can't be trusted.