Oh my! There is now a seller with a Bayville, Long Island, NY location trying to sell multiple fig plants identified as Black Madeira that were grown from SEED supposedly acquired from a Portuguese fig farmer... "evanrose" is the sellers name....

They may be grown from Black Madeira seed, but any seedlings will never be Black Madeira. They will be new, unknown, unproven varieties.

I seen this on ebay a long time ago. Check out how long apples from seed take to produce. Anyone want to wait ten years to taste your experiment lol. Don't know how long it would take for figs. There maybe some characteristics from the famous black madeira but the taste character is not going to live up. Breeding is very uncontrolled and getting the result you want aren't easy. You can even look to the famous fig breeders we know about. These breeders were probably planting fields of figs to get a few keepers. Years of work for a handful of average quality figs. Just look at all the figs out there now. How many have that black madeira taste? Hopefully one day I will be lucky enough to grow and taste my own.

IF and that a really BIG if, that seed produces a fig tree......like Jon said, it will NOT be black madeira.

Well they may produce a tree but I'm pretty sure I read somewhere that chances of a common female fig are 1/15. Not accounting for flavor, or resilience. In my wasp free zone If I ever bred at least they would be easy to spot, those and the persistent caprifig.

If you have time (several years) feel free to get a bunch of them, or start some from seeds and see if you get a fig worth keeping.  Its a gamble to see if you'll get a nice fig, but the odds are 100% you will not get a Black Madeira. 

@supermario1 - agreed