I've told my wife to ask the kids if they want anything in particular first, and then get somebody to broker a deal for the whole lot in Japan, no cherry picking once the kids get what they want. And if that doesn't work, donate it to the South Dallas Cultural Center, if they'll take it. And if that doesn't work, have Goodwill or Salvation Army bring a truck, haul the shit off, and get a receipt to claim whatever the hell she wants as a deduction.
No matter how you cut it, though, it's not going to be a whole lot of money. Better than Beanie Babies, sure, but by how much, I don't know. It's records, CDs, etc. These days, the music itself can be had, even the rare stuff, if you look hard enough. Whatever serious "monetary"value there is in a "collection" will be with the object-fetishists, of which there will always be some, but it's a limited market now, imagine what it'll be like in another 75-80 years when I die.