i would incorporate your black am's in with the lavenders, since splits are black anyways... 
 
you might have demand for the Exchequer Leghorns, if there's a possibility of getting them from splits, but few would want just the splits i think... maybe keep them for another year to produce actual exchequer's...
 
i would combine the black/blue copper marans as well. 
 
the german new hampshires seem to be hit or miss...  but locally people seem to want the chicks but not hatching eggs from what i'm hearing (from other breeders).
 
i'm debating between getting slw and silver laced bantam cochins myself, but leaning toward cochin since i already have other sq colors to work with if needed.
 
i've already got some blrw on order so 
 i'll have eggs/chicks available next spring myself.  this year was a learning experience for myself as well, in what sells and what doesn't. dorking eggs are popular, as are chicks, but half grown birds (in the gangly stages) have to practically be given away.
 
my bantam cochins, again eggs go, chicks sometimes go, but nearing 4-5 months old, i can't keep them at the swaps, they're gone quick. (black, self blue, mille fleur, & silver laced. my one white pullet went to swap 4 times before i gave up.)