Yes, Olhausen did sell (not make, but sell) a model that looked like that a few years ago. I think they called it a Patriot if memory serves. Looks similar to that, but I think the blinds were rectangular, not angled like those.
I was also thinking it looks a LOT like a Kasson. Hard to tell in the pic, but if it is a Kasson it will have 2 screws per blind right in the side into the frame.
I believe AMF made a couple models with a similar build as well.
At any rate, for $500 it's a good deal for something to bang around on. If you like the style of the table, go for it. Wether Olhausen, AMF or Kasson, all of those table go together fairly simply (with experience) and level up really nice for a low-priced table. I think you'll be pleased.
Let us know if you buy it if you are happy with it. Seems like you've been on the hunt for a table for a while now!