There's a person trying to sell me the DX 3000 (CG) to me for 125 (I'm most likely not going to bite at that price). The guy tried selling the bike for $140, but it seems like no one had any interest for the past couple weeks. These bikes were made back in the 80s (sold for $200+ retail back then), and it seems many of them were made. And everyone around on the forums seem to acquire them via garage sales around the $50 price range. If it was custom painted, I'm sure it'll bump up the price a little. And I believe these things run on 27"s. Overall impression of the bikes seems to be good, saying they are "reliable" and ride good, especially for their low entry price level.
I would most likely sell a bike such as this between the 50-100 range, sorry for giving such a broad opinion. And good luck seling it, seems very nice and the color is pleasant as well. (I honestly would like it, but I'd like you to get more opinions and give anyone else a good chance, I too am wondering the true value of it).