Antique single varietals

Cerridwyn thought this was worth mentioning said

Just wondered what unique old school wines people had tried and what they thought of them. I was reading about Charbono and wine in Napa and wineries founded on this now very obscure wine. I went looking to see where I could buy it. One place would only let you order a single 375 ml bottle?

So have you tried this or something else like it? Tell me/us about it?