Reading Pprune over the last few years, and from talking to PPLs who have joined the gliding club at which I fly, the selling points are:
- Feeling and experiencing pure flight without the distraction of an engine
- True power off stalls
- Something more than driving a cramped, noisy flying car to the next burger
- Exposure to aerobatics
- More sociable environment on the ground (perhaps)
- The challenge of staying airborne by skill instead of throttle setting
- Opportunities to fly in closer proximity to others
One gliding club had wool tufts taped to the top surface of the wings of its two-seater so students could actually see how the stall 'progressed'. Worth considering
Things that rile the PPLs are:
- The 'CFI is God' environment (particularly for experienced PPLs who have been making their own decisions for a while)
- The waiting around
- The 'You've had three launches, that's your lot' approach
If I was putting together a package to appeal to PPLs, I would focus less on the '£X to solo' and more on putting together an experience offering a mix of handling around the stall, spins,aerobatics and cross country soaring. The latter would benefit from having a self-launcher or 'turbo' so you can still go in marginal lift conditions.
As this sort of package does not appear to be currently offered, the price you charge is more down to you, and could be more lucrative.