FWIW, if you've still got your heart set on SB-105s (they're compact, run off of AA batteries, and are powerful), I've got 6 - 2 working great and 4 in various stages of working/not-working - that are just taking up space on my shelf. Contact me privately (email@example.com) if you're interested in giving them a new home.
P.S. i am aware of current process where nikon changes 103s with 105 s for free, but
that cannot be the only reason i suppose
According to the folks I talk to at Nikon here in LA, they stopped that program in the middle of 2012-ish.