Instead of dumping the collection back in his room, you should just sell them to gamestop or Craigslist and get your money back that way.

A good start! You should also look into getting your own bank account, fully separate from your family.

Also you're mom never questioned where your lazy ass bro got a fat wad of cash? Something about the story doesn't add up.

Finally if you want to be really petty, just wait until their next bday or Christmas comes around. Don't get them anything and if they ask, tell them to stop being greedy since they already stole a $150 gift.

Too small. Plus you are bound to get in trouble. Destroy the inner workings of the controller. Add some water to key components of the system. When he gets a car put a small rock in the place where air gets into the tire

hiding is nothing. Go directly to sell it. I suggest sell the console together with it and use the money to get your tickets. If questioned, say "we found it while nobody was using it. Finders keepers as you said". Your mother is shit, sorry