sells henry ford 's famous model t. despite his newest models being nearly 90 years old , the businessman , from buckinghamshire , is selling one every week , including to the tv and film industry who have used then in shows such as downton abbey that mr tuckett says his customers love the model t - the first affordable mass-produced car - because they do n't require need road tax or an mot and are cheaper to maintain than a modern car , with each one selling for around £ 10,000 .