I'm not seeing anything too far off on the prices there. It's a bit on the higher end, but yes this is a B&M you're tracking through that specializes in video games. As stated above, the casual shopper that just wants to pick something up might not mind the $15 for a one-time shot, but a collector that buys to fill shelf space for that system and holds onto it longer might avoid buying Mario 3 for that price as they already own it or dedicate the time to shop around. If it is an uncommon game I would certainly pluck a few bucks down knowing I won't spend countless hours digging through garbage sports at a thrift store or elsewhere just to not find it. Remember, if you already own it you can always look to resell a duplicate.