old wacom tablet

What’s the difference between this and the new models? If I can get one of these relatively cheap( and good size too), is it worth getting?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3680&item=5101051597&rd=1

The one in question only has a 9 pin serial interface connection as a means of connecting it to your computer. All newer Wacom tablets are USB.

ok… so? I mean, will that cause lag?

No, but it would certainly cause problems if your newer system didn’t have serial ports anymore…

Oh I do.