's that I deal w/ don't like freshly fragged pieces. If you have room to grow the frags out some after mounting them, it may bring more money by splitting it up- maybe. If you want to get rid of the coral to make room in your tank, you could cut 1-2 heads off to keep and trade the rest of the colony- Just an idea.
2)IME retailers, decent ones that is, will give approx. 1/3rd of what they plan to sell it for. Sorry I can't give a good dollar amount on the value. Sometimes I leave the LFS
w/ more than I thought I would, other times less after trading frags w/ them.
and good luck w/ it.