No but in part I made a few enquiries of bikes at dealerships.
Two Suzuki dealers didn't return my calls/messages.
A Triumph dealer in Nottingham told me on the phone 'your bike is probably in poor condition as its got 18,000miles on so we wouldn't offer you much'.
I replied the bike I was interested in buying from them was 17,000miles so not that far behind, thanked him and hung up.
I enquired about another bike but was told I couldn't test ride their test bike as they were busy with rampant sales to arrange rides(!).
I felt alittle stung by the bike retailer experience that I rightfully or wrongly started to draw a parallel between car and bike main dealers.