Little off topic, but SoW pots vendor for 18pp. So it saves a little plat by vendoring the pot when it has 1 charge left.
Its been 4 or 5 months since I've bought any sow pots, but it wasn't difficult to find them on the weekend for 90p, especially if you find someone who is selling them in bulk.
If you buy them for 90p and vendor the last charge its basically 72p for 9 charges or 8p per charge which I think is reasonable. Unless your quadding raptors
[You must be logged in to view images. Log in or Register.], a single quad will come close to covering the 8p for the charge you used.