Hi Liam, not an expert, but I know the SW Space book is fairly common and on the Bay go for around £6 - £10.
Haven't seen the ESB photo album so dont know about that - again maybe around £6 - 10 but I might be a bit off with that one.
Darth Maul don't know
thevintagetoyadvertiser.org 1970s and 80s vintage toy ads and other retro paperworks
imperialgunnery.com Vintage Star Wars action figure weapons and accessories guide