This is a wired controller and connects to your PC’s USB port. They are always available used, around the world. These are also the most reliable and generally last longer.
The Xbox 360 GH3 Les Paul is the best controller but less reliable than the Xplorer Guitar. Bear in mind that in order to use the Les Paul, a Microsoft wireless gaming receiver is needed. The connection between the neck and body can become loose, resulting in dropped input commands. You can hardwire the neck and body together for the ultimate solution.
Other controllers to look out for are the ones that ship with Guitar Hero World Tour, GH5 & GH Warriors of Rock for Xbox.
Problems with the strumming bar can quickly develop with the Guitar Hero World Tour & Guitar Hero 5 Guitars. The Guitar Hero 6 controller is less prone to this defect. All of these controllers can be taken apart for portability. They have stronger neck & body connections compared to the Les Paul and thus, there is no need to worry about dropped frets. As with the Les Paul, you will need the Microsoft wireless gaming receiver to use any wireless Xbox peripherals with your PC.