Not sure about the math. If a Leopard disc sells for $150, it's kind of a gray area as to whether the forty bucks for a gig of RAM for an iBook G4 constitutes a deal-breaker.
The extra forty bucks isn't necessarily a deal-breaker, but together with the abstract
psychological "
that, too, and all to perpetuate an almost obsolete and already non-fully-functional machine" cost, yeah... I think it may be a deal-breaker.