If you already know you're going to sell it after 8 months, whats the point of having it... Plus if you really want it and the reselling price should not matter.
Yes with CNG in civic price is surprisingly down in KHI market.
I suggest not to buy. Go for something right now which you will plan after 8 months.
7 year old car...uff Still people are crazy about it.. It has lost its charm to me.