I have no idea of the prices of any of them or if people are quoting the right numbers. However, they all attract VAT. To suggest otherwise is incorrect.
Similarly, this statement is incomplete:
Only VAT-registered businesses may off-set the VAT.
On the matter of people committing revenue...
PS @Jamouk : let me know if I can do anything to help. I am no psychiatrist but I care a great deal about the issue following my sister's suicide last year. The fact that many shooters deny themselves professional support, for fear of losing their certificates, is a great concern.
I think this thread is helpful as a reminder of what a small world the stalking community is, and of how difficult it is (no matter how unfairly) to undo a bad reputation once it has been gained. Any sharp practice by stalkers will always haunt us for years to come.