Why buy German fighters for Nationalist Spain?

Why did Nationalist Spain buy its air force from Germany?

The aircraft were cheap and considered decent, Germany was not using them, and the Spanish player could put them to use. In this run, they then suffered heavy losses against Republican I-16s.

Nationalist Spain's purchased air force is taking heavy losses against Republican I-16s in this run. Asked why he bought it from Germany, the Spanish player explains that the aircraft were cheap, usable and surplus to the seller's needs. The purchase gave him aircraft he could employ immediately. Their subsequent losses qualify that purchasing decision without establishing a general comparison of aircraft performance.