Simply put.. buying a transfer case is not too bad of a project. Installation is not horrible and the cost can be pretty affordable when you buy used. One of the most popular is the Jeep transfer case due to the offroading popularity of this make and the simple number of vehicles on the road. Here is the secret though.. most folks that have their Tcase go out are those that use it. WHen it comes time to buy one used know that most folks don’t use theirs so its not hard to get one with very low miles that is practically new. Don’t feel pressured to buy new or even rebuilt in most cases unless its a big heavy expensive thing. By used!