still haven't decided whether to sell or not but might let go if i find a serious buyer, currently i see mostly demand coming from european buyers...
i have the same concerns regarding ROI but that's true if you're in it for short run and bitcoins lose their value... however i'm a long run optimist so i intend to look at bitcoins as a long term investment so i just hope whatever i get to mine now or get from selling my blades will end up a decent ROI in the long run and that's as far as bitcoins are concerned.. if you look at a bigger picture: there are still alt currencies like freicoin, terracoins and ppc to diversify, by then difficulty for those currencies will still be manageable so i hope my blades will still remain useful till then unless they die on me...
personally i think the only reason those coins don't trade so well is because silkroad and exchanges haven't adopted them so there're still exciting possibilities in the next 2-3 years... i find freicoin attractive due its demurrage fee concept, you should check it out... ppc has good community that promotes its currency... eventually i think the winning currency will be the type that allows faster block confirmations for faster transactions, require less energy consumption, tend to be more secure to attacks and that can bypass regulations much like torrent that encrypts your transmission... even though bitcoin enjoys early adoption there's always a chance for an alternative currency to become a viable choice on the same level... if you notice we reached a stage where all it takes is a good startup company with access to top notch semiconductor facility since hardware and software research part are already taken care of due to open source... reminds me early days of Linux when it was just released and was ridiculed back in the days, look at it now...
bclc, you tempting me ah!
But alas, dont know how the ROI will be like after 3 months even if start mining now.