Karel Kryl Monology worth

I can provide you with a valuation based on the catalog data you have on screen.

The Karel Kryl – Monology (Vinyl, LP) is listed with a used price of $300. For the other two items, the Karel Kryl - Monology (Folk, World, & Country) and Karel Kryl – Monology (Cassette, Album) (Folk, World, & Country), the catalog did not provide a specific price. To give you a more complete picture, I would need to search the catalog for these specific items to see if there are sold-comp prices available for the cassette or the general listing.