You’ve done well Steve. I dispersed my collection through a local narrow gauge modelling group and their email list. Got fair prices, not as good as yours, but was more concerned that they find appreciative homes vs maximizing dollars.
FYI a local RR Museum up here just had an online auction close a half hour ago. Many boxes of books. Got a box of about 20 hardbound titles for $45 Canadian = $60 with the buyer’s premium and tax. Main attraction was Hilton’s American NG RR’s for a friend, plus a couple others like Beebe’s Mansions On Rails that I’ve always been curious about. So about $3 each, taxes in - you won’t be able to retire on the proceeds of your collection.
Cheers,
Ralph