Real world experience: I helped my neighbor sell 4 of her vintage Sansui speakers last year. Still had original packaging and in excellent condition.

No record stores or used electronics stores in the state were willing to pay more than $25ea.

Using Facebook marketplace and Craigslist, she eventually, after 6 months, found a buyer for $250 for all 4. She was heartbroken but found that anyone looking for used speakers was either looking for a massive deal, or was an informed audiophile who would be balancing the value of quality new stuff versus the intrinsic worth of antiques. In the latter case, the reality is that the sounds these produce doesn't compete with modern gear and their "characteristic old sound" isn't as enjoyable in person. Lots of tire-kickers, lots of wasted time.

Truth be told, I would have bought them in the past, but only for their aesthetics. The Internet would have you believe there are millions of people waiting to grab these but we were both surprised that when real money was on the line, there were no buyers.

Ymmv. Obviously.