Maybe a good deal, maybe not, but used Stern Spider-Man Omnibus is 40% at gohastings.com with code GINORMOUS. Total for me was about $47 before shipping.
GoHastings is hit or miss for things like Blu-ray slipcases (I also ordered the ASM2 movie for $7.50), but I figured it's worth a go to see if the Omnibus arrives fully intact.