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At most places that sell movies. ex:WalMart, Vintage Stock, Blockbuster.
Depents on
you do not need them for anything in particular but you can sell them to the merchant for some quick cash
You can try pandamimi.com, I bought my heavy rain on it, really fast shipping.
You have to upgrade all the weapons so you can get the achievement
do you mean handguns that are in resident evil? well a lot of them are general handguns. the red9 is a german broomhandle. The Chinese version would be a lot cheaper, and rpg's are very, very illegal, don't try to get one of those.
Yes, couple bucks at Game Stop, maybe more on craigslist
The merchant will sell case upgrades.
You will be considered a resident of the state of California as long as you live in the state. If you sell your home and move to another in the state, you will still be a resident.
Because they were popular at a time, and usually the only reason people don't get them is because most XBOX 360 games cost 60 dollars. So they put the games that arent that popular like Resident Evil 5, Burnout Paradise, and Assassins Creed, and sell them for 20 dollars so more people would buy them.
Gamestop will most likely give you $30 or less at the time being for RE5. Note that the price goes down as time passes.
There are many stores which sell these products, specially supermarkets. However, I don't know exactly where is your resident area. If you be kind enough to inform me about your resident place, I can advise you about the stores which sell clearance bbq grills.