Depending on how much $$ your wife wants, she might just take all of them.
She may let the kids take what they want and then keep all the remaining for herself to sell later.
Course, your kids may look at the value of the collection too and just want to select the items that they can sell.
Who's the trustee?? Your wife??
If you have someone else be the trustee, your wife might be pissed and take all of your collection to sell later too.
Just talk with your wife or get enough insurance that it doesn't matter.
If your collection is sold cheap, it will eventually become a bargain for another music lover.
Keep those 'used' record stores in business too.