Actually I did the same thing.....
Ehobbies found here: http://www.ehobbies.com/
has Tamiya Acrylic Paints for roughly $1.90/ea......
HOWEVER Shipping even using the slowest/least expensive method was downright scary!
So I ordered them from Steve's ScaleHobby....which can be found here:http://www.scalehobby.com/
Steves price is roughly $2.34/each....Expensive you bet! But he has free shipping on his finishing supplies and the Tamiya paints qualify! The price per bottle was more but by the time you figured in shipping that Ehobbies charged ScaleHobby was actually cheaper by quite a bit(I ordered 32 Tamiya paints all shipped but 1 that was backordered) Steve is also very quick to respond to questions/concerns.....
Plus he takes PayPal
Good Luck and I hope this helps