Understanding the 10pc standard deposit when buying land in Kenya

Land for sale. (Courtesy)

I have identified a plot that I want to buy but the seller says that I must give him a down payment of at least 10 per cent of the purchase price as the process of transferring the title deed into my name continues. It is my first time to have prospects into buying property and would appreciate to know whether the law actually provides for payment of deposits and whether there is a specific amount that should be paid.

Hope, Nairobi.