So, with the new firmware available, I started looking at refurbed 513s. Here is the product description on Amazon from Worldwide Distributors:
"Get a great DVD recorder. The Magnavox 320GB DVD Recorder features a built-in ATSC/NTSC tuner for quick access to HD programming. Additional features include progressive scan, DVD +/-R/RW recording and an included Magnavox remote control. Deliver professional-quality color at a low cost - Print professional color for the lowest cost per page vs. in-class, wide-format inkjet all-in-ones."