The location and size of the cheapest land in Decentraland can affect its pricing. Some smaller land lots were costing a few hundred dollars as of my latest update, but values change according to other reasons like market demand. The best source to find the most up-to-date pricing details is the Decentraland marketplace. We finally have more information about this thanks to Clarisco, a decentralized and clone script development company.
Check our portfolio: https://www.clarisco.com/portfolio