There is a wide variety of artificial lawns on the market these days. Models differ in production methods, turf quality, and fiber structure and density. These differences are expressed in the price differences.
It is important to remember when purchasing artificial lawns that this is not a short term purchase. This is a onetime investment for many years to come. Therefore it is recommended not to be tempted by the cheaper models which do not last long. You should carefully examine the model you choose, survey the market, and consult with experts in the field. Like any product, quality models are more expensive but their reliability pays off over time.