I have used a decent amount of spray paint rebuilding this car. All Rustoleum Engine Enamel. Both blacks (Semi gloss and low gloss) are 500 degree engine enamel, the flat aluminum I used is 2k degree high heat paint.
So I have been buying them at the local Autozone. $5.99 per can.
I need a few more cans to complete the job, so i checked Amazon.
I have an Amazon Prime membership, and love the free 2 day shipping.
They have the exact same SKUs, in stock, shipped 2 day, for $4.98.
http://www.amazon.com/dp/B002JFSXTYhttp://www.amazon.com/gp/product/B003CT4AKMhttp://www.amazon.com/gp/product/B002M1PTGKI ordered 7 cans total.
It's definitely worth checking Amazon, especially if you have the Prime membership.
/rant