Because they SUCK, signed or not signed by Sir Roger.
As much as I believe he doesn't own (or very little) of that famed James Bond collection, I do not believe he owns that red piece he is trying to sell. I think he is desperate for attention and will go to any extent to prove himself to others. The James Bond collection was the first step, and the first mistake. From this it spiraled down. He went from one lie to the other, trying to keep his head above water, and now he's stuck.
Didn't you say that he was wondering where to get the red poster a few weeks ago? Well, now he owns it and he is trying to sell it, when there are only 10 in the world (BTW, you're right, the gold version is much better). And why would he sell it, when it should have its place among the largest Bond collection in the world. And why not post it on a forum (any forum) to vindicate himself? Wouldn't it be the perfect way to show the world how great he is? Unless, of course, he doesn't own the piece and doesn't want to take the head AGAIN, like he did with the Bond collection.
T