Did Cornelius say he would sell off the boxes? If so I misinterpreted that, I thought he meant he would keep those 2 games with the packaging and sell off the rest. I thought you meant $150 for all the rest of the games with system, not for just those 2 boxes. I meant $200 for the rest of the games and system, nothing to do with the boxes for those 2 games. I guess with the boxes included it would be $350? I'm not up to date on the value of loose boxes.
I guess I was a bit confusing with how I worded everything. Basically, what Cornelius wants to do is the same thing I would want to do with that lot. When I said what I would do with the lot, it's how I would part it out to accomplish the same basic goal as Cornelius has(keep Bubble Bobble 2 and Snow Bros, part out the rest). If I managed to break even and still had some other games left over I would keep them too, otherwise I'd just want to keep Bubble Bobble 2 and Snow Bros. My main goal would be to break even while keeping those 2 games, just like Cornelius wants to.
It's been awhile since I've found complete copies of Zelda or Punch-Out, usually I just come across loose carts and can get $10 each for them when I do manage to find them. Keep in mind, the copies I usually come across are the Canadian version, they're worth the same amount as the US ones up here though you might specifically want the US version. When complete I would ask for more than $10 unless I was selling a bunch of games together.