I can't offer an opinion on price, it's so variable depending on where you live etc. The cabinet looks to be in good shape. Factor in if it comes with attachments, bobbins, does it move freely etc. I am not sure, but in the picture it looks like it might be missing part of the throat plate that covers the bobbin. I don't know how easy it is to find a replacement part.
Hopefully the more knowledgeable members here will soon give you some feedback. Nice looking machine overall.