Why prices are differnent when compares to amazon.com and shoponlinecomputer.com?

Because as we updated the price once in month manually in shoponlinecomputer.com that we can't keep update real time price which is amazon products price vary time to time.

Will shoponlinecomputer.com responsible for warranty/guaranty for purchased product?

Well shoponlinecomputer.com is is a participant in the Amazon Services LLC Associates Program, so we are not responsible for any warranty or guaranty. For further follow up you may contact amazon.com support for product related questions