Looking on Ebay for chargers and HobbyKing and Progressive RC and I see a big price gap. Really cheap chargers: http://www.ebay.com/itm/iMax-B6-Lipo-Battery-Charger-AC-Adapter-w-Dean-Style-XT60-EC3-Walkera-DJI-Plug/281909791774?_trksid=p5411.c100167.m2940&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140131123730%26meid%3Da3ccae76669b4fbcbc2def8895da7942%26pid%3D100167%26rk%3D5%26rkt%3D15%26sd%3D191785572192
and Hobby King: http://www.hobbyking.com/hobbyking/store/__58285__IMAX_B6AC_V2_Professional_Balance_Charger_Discharger.html
Any reason why there is such a difference?