Best place to buy paint

I'm looking for the best place to buy tins of paint, not rattle cans. Preferably cheap and in a decent size. EBay comes up with a few but most seem to be 1litre tins whereas I was more after 2.5. Also what's the best paint? I'm going to be using a spray gun and the majority of ones I've seen are cellulose but I'm a bit clueless when it comes to paint.

Cheers in advance

There used to be a place in Coatbridge that would mix whatever colour you wanted and supply in whatever quantity you wanted but it must have closed down as its not listed anymore, was across from B&Q next to the car wash.

There are quite a few listed here

Local Car Paint and Lacquer Suppliers covering Scotland

Cheers mate. Got it sorted anyhow, a mate works as a sprayer for a coachworks and can get me 3 2.5litre tins of enamel paint for £60. Not bad I reckon

There is a company on ebay called hugs paints, they are great, just message them what you want.