Hackney mermaid fabrics

Went to pick up some fabric for my new waistcoat today in Hackney. You might not even notice they have suiting materials cause its downstairs and the lights were off but the guy brings you down and there’s tons of stuff down there. I know I’m getting ripped off but still not sure how badly. I did bargain with him but later thought I got a shit enough deal. I don’t know, its too soon to tell