I suggest limiting the Black Market to 15-25 cards... it make set-up less insane and adds more 'planning' to using it. Dominion Online uses 25, which I think is pretty nice.
I actually think it would be faster for me to use the whole deck because the randomizer deck would be ready and it would take longer to choose the Black Market deck then to do all the other things necessary for set up. I think you have a good point for planning, but I kind of like the idea of having every card in the game.
Thanks for pointing out Knights. Knights should be interesting. I think I'll use the randomizer Knight and if it comes up the player could choose a Knight at random from the Knight pile.
These cards require special rules:
Embargo, Bishop, Monument, Goons, Candlestick Maker, Plaza, Baker, Butcher, Merchant Guild (tokens)
Native Village, Island, Pirate Ship(mats)
Trade Route (tokens & mats)
Transmute, Vineyard, Apothecary, Scrying Pool, University, Alchemist, Familiar, Philosopher's Stone, Golem, Possession (Potions)
Tournament (Prizes)
Young Witch (Bane)
Hermit (Madmen)
Urchin (Mercenaries)
Death Cart, Cultist (Ruins)
Bandit Camp, Pillage (Spoils)
Marauder (Ruins & Spoils)
Knights (Choose a random Knight)
You don't need most of those out if it's in the Black Market deck. Just take it out when you buy that card.
I think that's a good point. I probably only want to add cards that change the initial setup. Thanks for the Ruins tip. I'll add that, because somebody could buy that although I don't think I have ever seen anybody buy a Ruins.