In the 2000s, the Lincoln sedan lineup was not that impressive. This point downright outdated the Town Car in time. The Zephyr was released on the new platform that the new Ford Fusion rode on. The sedan was fairly modern, attractively styled, and had great off-the-line performance compared to other cars from this era. The Zephyr was the mark of a new era for Ford and the design of the car is still attractive (via Motor Trend).
The Zephyr was a great seller for the Lincoln brand, and that means there are many of them around. The resale value of the car is also affordable, so you can snag one for low prices. The Zephyr has gained popularity, as there has been a boom in the used car market. With the number of luxury features you get and the attractive styling, the Zephyr is still a great deal.