A quick perusal of completed eBay auctions suggests you could find similar deals most any day of the week. Lots of Linhofs going begging or not matching reserves.
My understanding is that III's are not nearly as desirable nor valuable because they have little if any interchange of parts with the IV's and V's. This is a significant because Linhof and Marflex no longer offer replacement bellows, etc.for the III (new Linhof bellows for Technika IV, V, 2000, 3000s are in the $500 range). Bellows could prove more expensive to have custom made than entire used cameras in pristine shape.
Interestingly, the 3 lens Super Technika kits were under $700 new in the 1950's, I just noted yesterday in an old Peerless catalog.