i definitely value people's opinions here. there's the site, slader.com that started off as a math website but has been paying people to add their solutions. i've noticed that recently they got tons of more solutions.
you don't have to register an account to check out a few solutions, so take the two seconds to see what you think about their answers. if you don't have the textbook for the question or exercise prompt, you can get it here: slader-contribute and hit request a chapter.
reply first with a rating on a single line, 1 being the worst, 10 being the best most reliable site you've ever seen. (basically wikipedia, google, physforum and other good forums would earn 10's)
let's make this discussion rock!