This is part of the growing pains of the industry. Just like the golden and silver age of comic books. Its just easier now a days to screw over the creators.
The mark up of 200-400% is nothing new, that happens with anything that's popular or new. Wii's and PS3's selling for thousands of dollars, and it'll continue till the end of time or the end of money. That doesn't make it right, someone's going to end up getting screwed out of the deal: creator, domestic fans, shop owner, international fans.
I've only re-sold two anime dvd's (first FMA disc got it free and the second of Chobits manga is better). I don't scan or take photos, and there is something about buying a used doujinshi that's just gross. Maybe that's just the doujinshi I would be interested in.
In the end I don't think it will change not for a good while anyway. People go where the money is, gold rush, diamond mines, oil drilling, and so on. We would have to give up anime in the states for those companies to switch back to creating things geared toward their domestic audiences. Even then people in other countries would steal it off the net.