Can i use a logo on my website to sell THEIR product without permission

The issue is whether this qualifies as fair use of the trademark. The last paragraph of the wikipedia article states:

The fair use defense in trademark law is not precluded by the possibility of confusion, according to the U.S. Supreme Court in 2004. However, courts may consider the possibility of confusion in analyzing whether a use is fair or not. Intent to sow confusion is also relevant; hence, the general rule that no more of the trademark should be used than necessary for the legitimate purpose. For instance, use of a word mark is preferred to a logo, and a word mark in the same style of type as surrounding text is preferred to a word mark in its trademarked distinctive type.

So using a logo is likely not fair use and you should use the words of the mark instead.