Let us know how it goes. It's definitely worth trying out. I'm just afraid of the possiblity of too many dead draws, but if it works well enough the dead draws may be negated. More options is rarely bad. If Bazaar could be tapped for mana, I'd be less concerned about it, I suppose.

Also, we shouldn't forget (though I feel I'm probably stating the obvious) that Necropotence and Scrying have terrible synergy when combined with Bazaar, since you'll be removing those discarded cards from the game, nullifying your Scrying (and YawgWill as well).

With a Necro in play, you've got 4 dead cards (Bazaar assuming you want to play Scrying/Will), with a Bazaar just one (necro) and with both Necro and Bazaar in play five (4 Scrying, 1 YawgWill.)

Using just Scrying and Bazaar though, could be a nice draw engine for mono-black or its variants, effectively replacing Necro, rather than working with it.