I know what you mean in the question, but surely you cannot set the price until it's known for sure what league we'll be playing in (sorry for any hint of optimism).
What are the costs of an ST among the "bigger" clubs in Div 4 (Pompey, Luton, etc)?
Bugger me, just looked the cost of an ST for Cheltenham for this season, and they start at £315 and go up to £414! That's as much as us, isn't it?
EDIT: While they're my closest league team, so will be easy away game for me, it's fooking depressing that we'll almost certainly be playing Cheltenham next season!