The two Zelda titles are easily worth $5 and $8. If I didn't already have the original cartridges/boxes of each, I'd be willing to spend a lot more than that to replace what I own. $5/$8 is a great price
Not to mention that a lot of the more rare titles (Super Mario RPG that will be released) are going for a lot more than the $8 price tag through the Virtual Console. Wasn't Super Mario RPG like ~$70 when it was brand new? Other games that might be included (Chrono Trigger, Secret of Mana, etc) also cost quite a bit on eBay (given you want to buy a good condition one with a box and such, not some crappy cartridge-only purchase), and will be great deals through the Virtual Console
Not everybody is a cheapskate who won't dish out $5-$10 here and there for classic games, to support a company who brought us lots of great memories of gaming