I don't know much about turbos, but there are a couple of things said that I would kinda dissagree with.
First, if it is really a POS, don't sell it. You made a mistake and all you would be doing is screwing another SRT-10 owner just like you got screwed.
That said, just because some tried it and could not make it work doesn't mean it is a POS, it just means they sucked and getting it set up right. Check out the thread:
http://www.vtcoa.com/forums/showthread.php?t=17166
Just look at the size of that single turbo... if someone could find a proper way to safely tune that monster, somebody CAN find a proper way to safely tune your STS. Functionally, how different can the hardware be, its just a turbo, a wastegate, and a bunch of pipe, right? Its all about the program, making sure none of the cylinders are leaning out or making sure the wastegate reacts before you overpeak the psi. Someone mentioned the #3 cylinder, well, that has nothing to do with the turbo, obviously other turbo setups have learned to overcome the problem.
If you're an aventurous soul, do your research, find an above average tuner, and be the first one to have a killer setup with an STS!!!
Disclaimer: If it was me I'd sell it
(Just kidding dude, I really hope you decide to stick this one out and dismount the STS myth)