After installing Dawnguard and immediately being attacked in Whiterun, poor Belethor ended up among the dead. Although he was not the most savory of characters, I would still like his services available to my character whenever I have some junk to sell. Could someone please be kind enough to tell me what exactly I must enter via the console (PC) to restore him to his former glory?? (*cough, cough*)

open console, click on belethor, type

resurrect 1

hit enter and voila!