why don't you Google the title and author? I've checked Amazon and it's currently unavailable there so there is no price comparison on that site. I've looked at other sites and it seems it was reprinted in 2010 so you might need to check antiquarian book sites.
I wouldn't raise your hopes. Dull subject matter, not a set, but one volume out of several, printed at a time when such books began to pour off the Victorian presses. With books, age doesn't necessarily signify value