I wouldn't have thought that 5% net is hardly enough to sustain development of future models yet they're pumping them out, 10 a penny.
I'll take Ford as a simple example. Have you seen how much you need to pay for say, a base model Fiesta nowadays ? 13.5K and up to than 20.5K for the top dog one.
I'd imagine most people, myself included, either PCH or PCP their vehicles nowadays, it makes sense for me.
Personally, using my example, I'd say that was overpriced and that there's more than 5% net in there for the manufacturer. Of course, I don't know 100% but they surely couldn't continue with such small margins.