Yeah, with shipping they're right about at the $60 mark, although apparently if you look around you can get older earlier editions of the tuba one for $117 (?????). Maybe yours has collector value.
My copy of Rochut (vol 1) I think is even older -- but I confess that I bought it used about 25 years ago in a bin that a local music store was getting ready to dump.
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)