This is where Lynx2Games, a relatively new game trading/purchasing service, steps in.
In their words, their mission is to create a more intelligent video game renting and buying experience. The service provides three payment options to allow you to get your chosen game in the best possible way to suit you. These are:
1. Instant buy: Get your games immediately for the regular price
2. Three week rental: Rent brand new games for a 1/3 of the price.
3. Delayed buy: Pay 2/3 of the price, wait three weeks, then keep the game forever.
Teaming up with a friend and using their 'Buddy Buying Service' allows you to split the cost even further by sharing a game between the two of you.
To explain the payment options further, check out this handy diagram/guide:
Currently available to US residents only, the kind folks at Lynx2Games have are offering a 10% discount to readers of 8-Bit Girl to use on their first game purchase.
At the checkout, type in 10OFFPROMO to qualify for your discount!
Go through to Lynx2Games and browse the games on offer here: https://www.lynx2games.com