Where to buy paint?

I took your advice and called a local shop I trust. For Go Mango Cost is going to be 382 a gallon for PPG Single Stage Shop Line Acrylic Urethane.

For Omni Line - 156 a gallon for AU and 125 a gallon for AE.

Does anyone have any recommendation on a way to go, I dont really want to have to spend the 650 it comes to for the Expensive stuff for a gallon and a quart and reducers and activator if I dont need to.

Does TCP Global have the Go Mango Equivelant?

There's also a seller on EBAY selling gallons of OMNI for 50-70 dollars, Do you think this is legit PPG Paint for that cost?

I can also get Sherwin Williams for around 100 a gallon, does anyone have any experience with their paint? I'm not sure what line, but it is single stage, a friend made the call for me.

Lots of questions Thanks for the help as always