Just my 2 pennies - have the values just risen to match the modern equivalent? The Fender Vintera range now retails for a similar price.
It’s similar to the s/h market of the older USA Fender deluxe basses now advertised for around £1k, as well as the American Vintage series, and Musicman USA Stingrays.
They all used to be advertised considerably cheaper, but since the new prices have taken a leap, so has the older gear. So not necessarily investment material, but just following the times were now in.