There are many ways on how you can find a cheap console game. One is to ask your friends if they have the game you are looking for and willing to sell it. The price can be lowered to half since the game has already been played or used by your friends.
Another way on how to find console games at a cheap price is to post on certain ad networks online. You can post the name of the game you want and how much are you willing to pay for it. You can then receive offers and check if the price the owner wants coincides with you budget.
You can also buy from online stores which sells second hand game consoles. They are cheaper than the original price but have already been used or worst abused by the previous owner.
The problem with buying second hand game consoles is that the game can have a problem or has already been damaged since the owner is willing to sell it on a cheap price. The best way for you to avoid regretting the purchase is to test the game first or ask the owner any defects of the game you are buying.
There are also online stores that sell brand new games at a cheap price. Yes, they are selling cheap consoles games but with high quality. The reason for this is that they are directly getting the copies to the manufacturer which cuts down the fees of middlemen.
Just make sure you do a thorough research if the site is legit or not. There are also a dozen of sites which offer very cheap price but in the end will just ran away with your money. It is also advisable to compare prices first before making any purchase since there are some online stores that offer a lesser price than other stores. Some online stores also offer promos or discounts like when you buy 3 console games you will receive a freebie.