There are a few things to consider when purchasing an amplifier guitar under 200 dollars. The first is the size of the amplifier. Some amplifiers are smaller than others, so it is important to choose one that will fit comfortably in the player's hand. Additionally, it is important to consider the type of amplifier. Some amplifiers are designed for louder sounds, while others are designed for more delicate sounds. Finally, it is important to consider the price. Some amplifiers are much cheaper than others, so it is important to find one that is affordable.