Not a big market for those, and the $150 is most likely fair value for an odd, antique, with some rarity, but don't confuse it with any later model as far as being a collectible. Even Thorens TD111 and TD121 from a few years later pale in comparison to the TD124 in build quality and features.
The direct drive on that model in known for having more rumble than is acceptable for a machine playing LPs. These are best served playing 78RPM mono records and lacked most modern nuances that the better drives, arms, and cartridges from 10 years later possessed.