as far as i know, there were a lot of active surplus subs arriving from Yokohama and Kobe. i witnessed a container van opened in one warehouse here in Davao a month ago and it had about half a dozen active subs, including esoteric designs, by Yamaha, Sony, Pioneer, Diatone and Kenwood (some were really beautiful and truly high-end). the warehouse price range quoted was from P3K to P6K but in that case, everything was taken by traders who had cash deposits with the shipper.
surplus Jap speakers should be priced similar to their amps considering even Jap audiophiles think these are inferior to British and American counterparts. if i have to choose betwen a surplus Jap speaker and a used Brit bookshelf speaker with twice the price, i'd still buy the Brit speaker. thus, a reasonable price range for Jap surplus speaker pair should be from P3K to P6K. unless you got the esoterics and high end models that originally cost over Y200,000 (roughly $1,700 now, but only $800 if the exchange is based 20 years ago.)