Here's how I look at it... NES games on Wii VC are $5 each. So far, there's one GBC game on 3DS VC, and it's $6 (Link's Awakening DX). It's likely that GBA games would be $8 (as that puts them on par with SNES games on Wii VC).
If we go by this pricing scheme... 10 x NES ($5) = $50 10 x GBA ($8) = $80 Total = $130
So, it seems like a pretty sweet deal to me.
"Corn chips are no place for a mighty warrior" - Teen Girl Squad
...I was happy with the €250 price I paid. I'm thrilled I'm not only getting 20 free games, but quite a few of them seem very good. All of the GBA games are excellent so far, and for the NES games, I think 2 of them are great. Don't care much for the other 3, but they may surprise me nicely.
Read the mania: http://www.fanfiction.net/~nonexistinghero In SA2, it's Super Sonic and Hyper Shadow.
An easy way to think of it is if the games average at least $4 a piece, you get your $80 worth. There's a good number of solid, quality titles among them, so I'm thinking yes, it is worth it.
Of course, the bit about their just being "free" is true too. Nintendo could've just as well not given the early adopters anything. So, I'm all the more open to it as a compensation. Personally, I'd say if the 20 games were worth $40, I wouldn't feel upset about the price dropping so much, so soon. And in that case, they'd only have to average $2/game. Great deal.