Ok So here's the low down, with info collected here included :-

1/8 3.5-4.0 grams (£15-20)


1/4 7.0 grams (£35-40)


1/2 Ounce 14.0 grams (£60-70)


1 Ounce 28.0 grams (around £120)


Still not sure about the visual difference between the good and bad, I was told skunk was the dark green good shit, someone said the exact opposite. What are signs of quality ?