I think you're talking about the studio cubes that cube4you is selling. I paid the normal price for mine, because I got them through someone else. The guy from cube4you is just trying to make a big profit by selling them for that much. They usually are made more precise, but there's no major difference between the two cubes. I'm not about the spring tension. I know the old ones had screws, but I"m not sure about the new ones.