(keep in mind i'm the person who returned the nicest looking single-gene Clown ever after it was sent to me by mistake on my own time and dime.)
i find some peeps don't like to advertise the fact that they have snakes b/c of the "stigma" and putting up a signs would draw unwanted attention to them. now if there was an easy way to find the snake without getting the attention like if someone else put up the sign saying they found it, it might have been easier.
anyway i didn't realize u had the BP for a year at this point. if u feel u did you're due diligence, no one would hold it against ya. so it's up to u what u wanna do.
also i'm looking at the pix again. there might be something more to it than a Black Pastel (or Cinnamon) b/c of the long connecting alien heads. breed it to see if something else pops out. if there's Mojave in there, u got don't have a $500 BP; that's a 4-figure snake.