Hardy Boys Mystery Books Collection

Prices are as follows per book, they are best offer and reflect book condition/year. If more pictures are needed message me :) The Mark On The Door #13-1934 $60 obo The Secret Of Wildcat Swamp #31-1952 $30 obo The Secret Agent On Flight 101 #46-1967 $20 obo What Happened At Midnight #10-1967 $5 (spine is separated from hard cover, shown in pictures) The Mystery Of The Flying Express #20-1941 $40 obo The Witch Masters Key #55 -1976 $30 obo Mystery At Devils Paw #38-2002 $10 obo