CaddMann - I have been buying from Scale Hobbyist for a few years, faultless service and quick deliveries. I can recommend them from personal experience. Shipping costs seem in line with the usual.
I will echo what CaddMann has stated about Scale Hobbyist. I order from them frequently and have been very pleased with their service and selection. Even though they ship from New Hampshire to Idaho for me, the delivery arrives very quickly.
Another online store that I use frequently is Hobbyworld-USA, they tend to carry a lot of the other brands that you cant find in other places, like Mr. Paint, Hataka (I think from Poland) and others. They also carry the Ultimate Modeling Products line which I enjoy using.