Even if I never used the L07D, I would not part with it. However, I am not going to live forever, so perhaps you should become friends with my wife, who does not play LPs and whose mother lived to age 96. She will have a lot of stuff to sell, if she outlives me, as expected.
In my opinion, there is no way that the SP10R will sell for less than $10K, retail. If for no other reason than the fact that it will be viewed as a "bargain" even in the $15K to $20K price range. Further, it will be the flagship of a new high end line of equipment from Technics, as Raul suggested. Speaking of Raul, I hope that he and his family escaped injury and loss of property in the Mexico City earthquake. Raul, if you are out there, please report.
Inna, I share your appreciation of R2R tape recordings, but that pursuit is for the deep of pocket crowd only, not because of the initial cost of the machine but because of the outrageous cost (and paucity) of the best quality tape recordings. A 100-tape collection might set you back $10,000!