Just in passing, I've just come back from a business trip to San Diego. Whilst there, I had an afternoon free and spotted the "San Diego gliderport" - with hang-gliders and paragliders all over the place.
So I went and asked about a dual hang-glider flight, which I thought would be great fun. Until the I saw the price - US$175 for 20 minutes.
So, I didn't get a go in a hang-glider!
Oh yes, the real question - £140/hr for a PA38 seems about right for dual instruction in the UK at the moment, but it does vary from place to place. See what else is on offer locally for comparison.
G