The difference is $10 bucks between a $15 a gallon paint and a $25 dollar a gallon paint. How about Pratt & Lambert paint. Name brand, good quality paint that can have a big price tag. Guess what... that's what goes into Wal Mart's brand of paint... Pratt $ and Lambert. Price tag 12 bucks. The key is not so much the cost of the paint as it is PREP, PREP, PREP.