I'm not sure what your expectations are when you say "investment piece". If you are looking to spend $2000 on something that will go up in value, I would recommend you look into more traditional investment tools (ie mutual funds). The degree to which a spy retains its value depends on how well you treat it and how in demand a particular color remains. So far the reaction to the tribal spy hasn't been overwhelming, so I wouldn't expect it to be one of the super-rare, in-demand colors in the future, but I would expect you could get around 50% back, maybe more, selling it on eBay later on if it is in good condition.