testing the waters: how much could I ask for Classic Publications volumes nowadays?

[Bookman]

Man I sympathize, I've over two metric tones of books/magazines and ephemera, mostly military aviation, in over eight languages from1915-now.
Recently I've sold the first edition of panzerjager for $175, at a regional show.
Problem is the younger people are less reading ready as the more serious and older folks.
A particular concern is that there are so few who are comfortable in another language, let alone several. Not everything was translated, or well done. Many (truly) interesting works remain obscure. Myself I've several manuscripts waiting for me to translate when I retire (ha) nowhere else available. Do you live in the US? Other classic titles slowly being republished, sometimes expanded versions. In an case best wishes, keep looking at eBay for the most realistic offerings. Worldwide exposure is great.