Overpricing games neccesity??

Everybody knows that you can't have everything and money doesn't grow on trees but is $60 a fair price for a video game off the shelf? I do not know how much it costs to make a game or how much revenue the game developer gets of the money I spend on games but $60 a game seems very high. Along with the initial price for the game DLC, although expanding the game, seems almost a neccessity especially if one is to play online. So far, halo 3 has released 3 map packs priced at 800MS points, I spend $60 on the game and $30 on DLC this game is $90 so far. Fallout 3 is up to $80 with more DLC coming and I won't even imagine what the overall price of Rock Band 2 would be if someone downloaded every single peice of music. Rock band seems to have the right idea of making the music that will not change anything in the game and is in no way neccesary to play online or to get achievment points seeing as that's the only reason some people play certain games. The attemps to make games cost more than the initial price is overwhelming from the buying weapons plan of battlefield: Bad Company to the recent RE5 vs mode pricing instead of including it with the game (as mentioned in the abuse of DLC). Has pricing become out of control, or is it neccessary?