A lovely carpet that is well made and affordable is always a good buy, and will bring you continuing pleasure for years to come. Beauty is subjective but one can learn a great deal by looking at all different types of rugs. You also learn about what is available in your price range and what you can expect to find. If a rug is beautiful, well crafted and within your budget, then it is probably a good choice for you. In a nutshell, beauty, craftsmanship, age, condition, rarity and demand determine price.
Handmade rugs are much like furniture in that they come in many degrees of quality and beauty.
There is a market for all of these carpets. A rug from any of these categories can be a pleasant addition to your home.