I bought an RSA Predator from tha_dude (Tony). He was polite, forthcoming, very prompt and thorough in answering all my questions, and my purchase from him arrived quickly and in exactly the condition he advertised it.
Purchased an Edition 9 from tha_dude, and it was smooth sailing from start to finish. The headphones were in fantastic condition and delivered quickly, with prompt communications throughout. Thank you very much!