howdy, i'm in the market for a camera, is it working?
Yep, works great!
i'd be happy to take it off your hands for $40, since its an older model
Unfortunately, I can't go that low.  I would be willing to part for $80.
can you do $50? there are newer models available now with more features since this one is a couple of years old...
Actually it's only a year old :)  I would be willing to part ofr $75, final offer.
can you throw in an extra battery, ill agree if you can
Sure thing.