In the south west (i heard this from rumours because im clearly not from that part of the country) you can pick up standard bog weed and it should be £25 for 3.5, £20 for 2.8 and 1.4 for £10. For the ultra-boom-pengdengle it's £10 on the gram. Having said that, depending on how selfish your dealer is means it does vary rather a lot. either way its too much!!