I've started the next holiday fund
Took a couple of books to London with me - sussed out the right dealers in December, they said they'd definitely have them and price would depend on condition - and I got a fair bit more than I expected
Their shops are in Cecil Court, which is all bookshops, and they pay a fortune in rent etc - but can also ask premium prices, so I'm pretty sure I did better than trying to find buyers privately
Sadly I don't have an entire library of valuable books, but these were just sitting there on the shelf (I've always known their rough value) and I decided their time had come