I think it's fine. It just depends on the person buying. I mean, people pay $60 for 8 hours of single-player. On the other hand, someone who likes multi-player might get hundreds of hours out of a multi-player only title.
Personally, at $60, I only buy games with high value, where I know I'll get at least a couple of weeks of play time. Multi- or single-player, I don't think it matters.








