Since we're talking about value and such....you do know that straw (yellow) coloring in the hackles is a serious fault by the French standard, right? Also, I can't really tell for sure about the tail angle in your pics -- but you do know that the angle should be no more than 45 degrees, right...
BC Marans (or any Marans) are not all created equal. I personally wouldn't pay a dime for many of them. OTOH -- if you play your cards right and talk to the right people, it is sometimes possible to get wonderful birds for free or very cheaply. So don't focus on the price -- focus on learning...