I'd be suspicious of anything too cheap, especially on ebay. There are alot of cheap knockoffs that try to use factory branding. Sometimes you get what you pay for. Isn't that why most people spend the extra money on a Toyota or a Lexus? They know they are spending more on a quality product...
Did I misunderstand your comment? Are you trying to say that you are able to source all eight (8) in a package for $100-125?
Yes, you can buy them for less that $125 individually through the dealership, but if you go through a few of the local parts dealers or a few that have been a huge help...