I just purchased a home and have decided to revamp the backyard deck. The current deck has a flagstone ground; I think it is Colorado Buff. It is roughly 700-750 sq ft of stone and about 1.5 inches thick. Brand new, it is around $4165-$5000 (assuming $500-600 per every ton or 90 sq ft). I'm asking for $3000 OBO--please be reasonable.