In the case of this Duo-R here, I don't think it will attract much attention from collectors willing to pay a premium for boxed and complete items due to the missing manual and inner packaging. For this reason, I feel the price is a little high.The region mod is a bonus but not as important as an RGB mod or new CD lens being fitted.Looking at the current market on eBay in Japan:A loose Duo-R with original controller, AV cable & PSU will set you back $225 delivered via EMSA boxed & complete Duo-R will set you back $270 delivered via EMSA loose Duo-R with new lens, RGB/region mod etc will set you back $285 delivered via EMS.I'm not sure what local shipping for the item being sold here would be, but will just estimate it at $30.So when you look at all the data, this Duo-R which is costing you $305 isn't the best deal around. I think that $250 delivered within the US would be a fair price which should get it moving pretty quickly.
i can confirm the $30 domestic shipping.