Group , Just a FYI message , Want to let everyone know that AOR will not repair any of their no gaps full 800mhz band receivers unless the receiver is owned by a government entity. They will not repair one even if it is owned by a commercial electronics lab that does not use it for general receiving purposes. This goes for AOR USA and AOR Japan. So before purchasing a used full coverage no gaps " U " model or a used AOR AR One or any other full coverage no gaps AOR receiver one should take this into consideration.. The full coverage no gaps receivers usually are more valuable and sell for a bit more than blocked receivers but with the repair issue I would think that a blocked receiver is now more valuable than a unblocked model. Again , Just a FYI message .