Over the past year, my dad's Powerbook G4 (OS X 10.3) lost the ability to run any usable version of firefox or other end of life PPC software. Apple customer service wouldn't sell him a copy of 10.5 and told him to search ebay for copies of OS X 10.5, 8 months after releasing 10.6. We've been watching ebay and the price just keeps climbing above the original price.
I told him to buy a copy of 10.6 and the license should allow for installing older versions. He took it to a 3rd party Mac dealer and they said they couldn't install 10.5 if he doesn't own a 10.5 license (which no one will sell anymore). Does the OS 10.6 license cover older versions of OS X? Can 10.5 be obtained for the original price anywhere?