No, it's even worse...They only open on Monday at noon and stay open until they are sold out.
If you're in the UK that could mean Monday to Friday as they aren't as widely known over there, but stateside it's most likely a couple of hours!!
I was lucky enough to grow Port & Stilton once, by being gifted a couple of seeds ♥
...This cultivar tickled my interest in Mephisto so much as it was one of the best I've ever tasted. But the sh!te is I live in Europe and Mephisto doesn't do business here anymore since the Brexit. There is a UK based shop that does send across the canal, but I'm not willing to pay top dollar to a third party seller, without the addition of the many freebees Mephisto adds to their orders. It's only worth the prize if the quality is there and the addition of white label seeds to a 'high value' order doesn't appeal.
So I patiently await the day the Eurostore opens up again or they start sending seeds from the UK...Till that day comes I can only endorse breeders I trust and can order with. If you like, send me a pm and I'll give you a couple of links.