2004 chevy venture new battery, all power wndows work, just went out to start and not even a clicking noise. help?

Sounds like the starter...

Check battery terminal connections to make sure they are nice and tight. Check wires going to starter solinold making sure they are nice and tight also.

And if that does not work have someone tap on starter with a hammer while starting vehicle if it starts its the starter.

I tapped starter and it started!! so I need a new one? how much usually to replace?

The starter solenoid may be bad. If you know someone that can test the starter, the solenoid may be replaced for far less than an new starter. Make sure all the connections are clean and secure.

I guess it all depends on were you live and the shop or mechanic you get to change it . Best to call around to see who has the best price.