Once again no hard data and 'unscientific' approach to get my conclusions...
Back in October 04 when I bought mine. It seemed 40-50k mile 01' Insights sold for 10.5-12.5. Now - my fiance is interested for gas purposes, I'm seeing significantly higher milage, 50-80k for the same price range. Also I see alot less advertised (although, I have not looked as hard as I did when I bought mine) .
Also, as im sure many relate, Insight owners/driver answer many questions by people who see the car and curiousity strikes. I have noticed alot more interest in the car particularly within the last month because everyone know sthe vague idea these cars get good gas milage, and they are seeing 60-80 dollar gas fill ups while we see 20-25. yet we drive significantly further per tank.
so in short - I've noticed prices for used insights are more than they were before for the same thing.. but finding 30k mile insight also got harder with 9months time passing. But thats not appreciation thats depreciation slowing. Also exacerbating trends is the value of money. 10,000 does not mean what it did even 6 months ago, look at housing.