will this work need help thanks

[animekings99]

i have Comcast internet and i cant get dsl or dial up were i live can i do this and will this be safe. i have a cable modem. and i have 4 ebay acc. can i just buy 4 routers and use 1 router for each ebay acc. or will they see my modems ip ?????? i know when you bridge a modem with a router it gives you a new ip. BUT my question is can ebay see the cable modems ip and NOT the routers ip. i don't want to lose all of my ebay acc please help tanks lol boys and girls.