hi adrian, i have been trying to sell my 2000 'S' for over two months, and found myself in a comparable position to yourself. my car is of a very similar spec to yours, fpsh and all the right bits etc, with 37k on the clock. i have advertised the car on this forum, top marques and as a last resort, e-bay!!!! needless to say, none of these arenas got me a sale, just the one tyre kicker, very very frustrating.
i concur with other contributors to this thread, in that supply far, far, outstrips demand for these cars, even during the period when they 'always sell'.....summer. in the last issue of top marques i noted eight sides of boxsters for sale, 10 of these were private 2000 's' cars, and the cheapest was 18.5k. i checked the auto trader site yesterday and there were 200 boxsters for sale, and the cheapest early 2.5 was in the region of 13.5 if memory serves!!!!
good time to buy, not so good if you are selling. i was offered 17.5k for mine from an independent, and he wasnt that keen to take the car off my hands, because they are just not moving.
but, the goodish news is that i have sold the car, not via any form of advertising, but thru good old word of mouth. a guy, heard a pal of mine attempting to sell my boxster to his brother, he asked for my number, viewed the car last week, loved it to bits, and is collecting it on wednesday. i accepted 20750k for it, i feel its worth a bit more, but in the present climate i snatched his hand off.
hope you sell the car soon adrian, but, as much as it hurts, be prepared to move from the figure you have the car advertised at, if you want to move it on, good luck.
regards g
'97 C'S'