hey guys there is any fix to get a replacement when Belethor die, bc after i did my Silver Hand quest he die (i think is cool that mean i kill someone when i was a werewolf) but no one take over his shop, so now i cant sell my stuff on Whiterun. Anyone know a fix to this???

It can't be fixed as Sigurd won't replace him, even if he used to work for Belethor. Just look at http://www.uesp.net/wiki/Skyrim:Sigurd, a clear sign of rushed development.

When you approach him, he will not hesitate to explain his involvement with Belethor’s store, saying, "I work for Belethor, at the general goods store.", "Come by Belethor's shop, at the market. I'm sure we've got something you need." or "Shop at Belethor's for the best prices and selection. He pays me to say that." At other times he will simply say: "Don't mean to be rude, but I'm too busy to talk right now".

He kind of sounds like a robot. And looks like a robot, too, having always the same facial expression. That boy has no life...

wow that svck, no i have a permanet close shop on Whiterun =S