Antifreeze leak...manifold or head gasket?

[rcpd309]

My low coolant light came on last week and since then I've gone through 2 gallons of antifreeze. I took it to the shop, and the guy said it looked like I needed to replace the gasket near my thermostat housing (I think). I took it to another place today, and they said it was my head gasket and that it would cost $700.00 to fix. I asked a co worker to look, and he thinks it's the manifold gasket. When he squeezed on a hose you could see antifreeze getting pushed out around the seam of the manifold gasket. Does this sound right to anyone? I hate to take it in and have a head gasket replaced when it doesn't need it.

Any advise would be very appreciated, and thanks in advance.

[turbograndam91]

the pipe comming from the over flow bottle has a oring at the housing and the houising is made from plastic they worp
also check the watter pump they also can leak ?