GT HD was originally annoucned to be a completely barebones game, like 2 tracks and 5 cars. In order to "unlock" additional tracks, cars, and anything else you'd want in the game would cost you around $1-$2 per item. Looking at the entire list of what they offered, the complete game would cost around $1,000.
Then I'd have called it a rip off and never touched it. It's not like every wii owner buys off the VC.
Oh, and on Ebay, most of the games that I would want are still over $20 for the original cartridge, and that's used. The new ones are still going for 40-50. The only games that would be cheaper are the really shitty games that no one is buying on the VC anyways. Rom's still don't always work, definitely don't work as well as the actual game, and not all games/consoles can even be emulated. You want to use Rom's, fine, whatever; people are willing to pay for the convenience, that doesn't make it overpriced to anyone but you.
I bought the original Mario, mario 3, both NES zelda games, original metroid, original final fantasy and the captain planet game for 2-3 dollars each. Maybe there's a FEW expensive cartridges out there that would be cheaper to buy on VC, I don't know, there was nothing out there I wanted and couldn't get for 3 bucks. However.. there's TONS of games out there VC doesn't have, and all the ones VC does have been out in cheap cartridges since before gamecube. The question being... if mario bros for 5 dollars is to you, a good deal, a value, worth your money... why did you wait til Wii came out to get it?
If they just lowered the NES games to 2 dollars, the SNES games to 4 and the N64 to 5... they'd be cheaper to buy than the media and therefore legally the best alternative. I'm sure they will lower the price, once people stop paying the crazy price.