I was wondering about that, too.Huh...??
You bought a Ric 25 years ago, it's appreciated 10 times what you paid for it, and you're asking why Ric's haven't grown in value??
Also, there simply is not a waiting list for 4003s anymore. I think there was 2 or 3 years ago, and people have kept repeating that like a mantra ever since. They're readily available at a number of online retailers and brick-and-mortar shops.