I mean vs the new prices of those items (assuming you wanted them and would have been buying them anyway). Bought new, the EM5 grip is £200 ish, the 45mm 1.8 also £200 ish. Could sell them of course, but both are well worth having and kit lens probably worth keeping for a cheap way to 12mm and handy 'macro' feature given that you would only get £100 or so by selling it going by ebay sold listings.
EVF is the same as EM5 according to this:
http://www.dpreview.com/previews/olympus-om-d-e-m10/3 - in fact slightly improved in one regard: "The built in electronic viewfinder is straight from the OM-D EM-5 and so is large and a pleasure to use. It also gains another E-M1 feature –adaptive brightness which means especially dark or bright areas appear as they do to the naked eye – rival systems tend to overcompensate in extreme lighting making it difficult to asses the image." (From:
http://blog.parkcameras.com/2014/01/olympus-launch-new-om-d-e-m10.html )
DPR preview page claims only half a stop difference between 3 and 5 axis (CIPA), but says 5 axis is better for close up subjects ("
not quite as effective (particularly when shooting close-ups"). Having not compared them I have no personal experience of that though.