Not saying it isn't true, but I didn't see any in that cost range (again though, very few developers release any of that data).
This is true, however a few high profile titles have been reported to have budgets in the range of $100 million.
http://www.imdb.com/title/tt1814884/business
http://www.guardian.co.uk/technology/2012/mar/09/grand-theft-auto-bang-bang-youre-dead?newsfeed=true
http://venturebeat.com/2012/01/20/ea-spent-only-200m-to-make-star-wars-the-old-republic/
http://www.cinemablend.com/games/Epic-Mickey-2-Production-Bigger-Than-Call-Duty-Resident-Evil-6-40564.html
http://www.gamesindustry.biz/articles/2012-03-27-pre-owned-increases-cost-of-games-cannibalizes-industry-says-dyack
http://kotaku.com/5893013/game-sales-are-dead-long-live-game-sales
Video games are not "luxury" items. To be sure, they certainly are not necessities but their ownership rates have taken them deeply into the realm of common goods. In a free market, people pay what they think the game is worth. What publishers are trying to do is eliminate the second hand market (i.e. their competition) so that they can continue to engage in price-fixing. I can't pay what I think a game is worth if the only place I can buy the game is from the publisher who is greatly inflating the price point.
In economics, "necessity goods" are essentials that consumers will continue to buy regardless of income, like food, water, electricity, etc. They have a low price elasticity of demand. "Luxury goods" are goods with a high PED, and in the case of videogames, the price elasticity seems to be http://translate.google.com/translate?hl=en&sl=sv&tl=en&u=http://www.netopia.se/2010/01/30/prissattningsparadoxen-natets-logik-bryter-alla-regler/
I'm not familiar with price discounts for older console games, but for PC games, within the first 18 months the digital download prices can drop down as low as $2.49 - $9.99 for many games that were once $50-$60. Perhaps you will start to see more of this type of pricing for digital downloads on the next console generation as well. (Or maybe more consumers will buy laptops and desktops instead of consoles.

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As for used games, it's exactly the same bits of data, how can any publisher compete with that? Of course they will seek to limit or restrict used game sales, as this cannibalizes sales of new games. Part of the reason why the indie DVD market collapsed a few years ago is because Blockbuster was turning around and re-selling all their new release revshare copies for a $4.99. On the PC side, we have already been accustomed to not being able to buy used software applications or games for several years.