I have the Dahon Eco with 7 speeds so hopefully its the C7 although I've been told the "Eco 3" is also 7 speeds. Mine just says Eco.

Mine has the telescoping handlebar stem whereas the product image has a fixed stem. Clarifications aside here are my impressions.

I originally wanted a Dahon D7 but the price drew me in and the Eco is what I got.

One feature I believe the Eco has over the D7 is climbing ability. The lowest gear on the Eco provides a very strong climb up fairly steep hills. I can pedal up the hill without raising myself off the seat.

I cruise around town in the 4th or 5th gear and never move into the 6th or 7th unless I'm in a long straightaway where no stops will be happening. It shift smoothly and the ride is very comfortable.

I've ridden the D7 as well and I believe its only advantage is top speed since its geared a little higher. But when purchasing a folding bike, top speed usually isn't a major consideration... Read more

In the picture of the item there was a bike rack attached to the bike. None was shipped with the bike. If I order a rack that would be an additional bring my price right up to the D7 at $549. You should have the vender provide an accurate photo. The bike is rates an "A" but the vendor rates an "F".