The Altair 8800c shown here is not actually one of the original Altair 8800s, but instead, a fully functional Altair built entirely from new equipment and boards available today (2018). Click the picture to learn more about this computer.
Hybrid versions of this computer, with a mix of new and vintage equipment, are a great idea as well. The computer can serve as a reliable platform for testing and working on other vintage S-100 boards.
While obviously not a vintage display piece or museum item, this is a great hands-on way to experience the Altair for less money and with less restoration headaches than purchasing a vintage Altair off eBay.