Alas, a good-condition Tizio usually sells for around $200-$350 used, depending on the exact model. First-generation models may go a little higher, like $500-$600. I bought mine a couple of years ago for about €250.

If you browse sites like 1stdibs or Pamono, you're going to see dramatically inflated prices, but I don't see why anyone would ever buy there. Ebay, Selency, Vntg, etc. are more likely to sell at actual market prices.