A while back, dash timers were hot, and prices were going through the roof. Then focus here shifted, and prices crashed. Something similar happened when everyone here was gushing about Monacos (which never interested me), and then, poof, everyone moved on to Rindt Autavias, which could be bought for a song.
I've moved on to other watches. Right now, I'm wearing a Breitling panda 810-24, and I love it. I regret selling both my Sifferts, though I made good money on the sales, but only because I loved the watches. No doubt they would be worth far more now, but then, I was never in it for a speculative payoff. Just to enjoy the watches.