And yes, the Greco and Tokai basses have appreciated nicely - but this isn't one of those brands.
True, but the fact is that those Japanese factories churned out tons of great basses with the same materials and specs and finish work under all kinds of "brand names."
Companies/distributors paid the factories to put certain names on headstocks in order to sell for different markets.
In other words, you can find identically made instruments of the exact same quality even made in the same week with a dozen different "brand names" though there is often no discernable difference (aside from the name on the headstock) between a Greco, Tokai, Aria, Ibanez, Memphis, Mann, etc.
Where it gets confusing is that the same factories also churned out some cheaper "lawsuit" instruments at the same time, sometimes with the same brand names.
More daunting is that fact that many of these brand names were later sold and produced in Korea and China and were generally of low quality.
For example, the Memphis-branded instruments MIJ during the 70s "lawsuit" era are excellent instruments. Later Matsumoku sold the Memphis name and most of the Memphis-branded guitars and basses made in the 80s (MIK and MIC) are among the most poorly-constructed pieces of **** you can imagine, which tends to degrade the perceived worth of anything with the Memphis name on the headstock.
For reasons I certainly don't know, this didn't happen with "brands" like Greco and Tokai. I've never seen a cpmpletely crap Greco or Tokai; they all seem to be really well made clones.