The one thing I have learned about collecting ( stamps, coins, figs etc) is that something is only worth what another is willing to pay for it.
Ebay is the walking example. If you hit it just right, you may pay little compared to 2 weeks earlier. Not to get specific but I was very fortunate to get a sought after fig that easily could have gone for double what I paid. I just hit it right.
That Sal's someone paid 300+ for, was worth 300 for that person.