I feel no need to push people into my system or charge questionably for it. If companies price systems high they are simply trying to add "fake value" to potentially useless systems. If they price very cheaply e.g. £10 or less then they are selling you probably useless information but the amount is not enough for people to fuss about.
Please note that I reserve the right to reject any sale with prior warning or reason. A full refund will obviously be given in this case.