Mold and Water Damage are very skeptical issues especially if you are thinking Black Mold.

Main components of rehab were:New windowsRefaced cabinetsNew rear doorNew french doorPaint interiorNew counter topsAll new floor coveringsUpdated all electrical finishesExterior paintedNew gutters (First time we used black and think it turned out really nice.)Graded a new gravel drive.This was the first time I attempted to use a GC.  

if i were you, i would take a sample and have it tested just to have it tested. if it is mold, there are 18 different species of black mold and only 2 are toxic. that advice is coming from a licensed home inspector with a mold certificate. if it is black mold and is toxic, then you can remove it yourself, but protect yourself too. make it part of your offer. if the seller doesn't want to accept your offer based on the mold, then walk away. if you do not want the place because of the mold issues, would someone else want it?

It's a black hole.  

Kitchenaid announced a black stainless.  

There is also the Black Diamond meeting every other month in Waltham (Alternate months in Worcester) with the next one being in Sep.  

He started yelling at me and saying I made accusations against them because they were black.

Home Depot's cheapest porch railing is a black metal with twisted balusters.  

Black funky mold in the shower, dust on the baseboards and door jambs.  

I'm in West Joliet just off Rt 59, north of Black Road.