There was a nearly identical discussion about this very board just under a year ago, seen
here.
Really the only thing that has changed since then is that the board in question is yet another year older, ETC's Smartfade and Cobalt/Congo series are now heritage products (but can still be found), and ChamSys is in the process of releasing a new entry-level series of hardware boards as mentioned above. The general argument is still the same though - don't be fooled by the attractive prices on usedlighting.com. You get what you pay for.
If you must have hardware, ETC's ColorSource and the upcoming QuickQ series will be about the cheapest 100% hardware consoles on the market that are actually useful. Beyond that, be ready to drop $5000-7000 to have some real options, and even that is still considered cheap for a light board. If PCs are an option - TJ's M-PC w/ M-Touch suggestion is the cheapest option out there that has some hands-on control. Good luck!