Ok, so since a week I am also a proud owner of a dual sim Eclipse. On the first spot, it is not bad for the price: acceptable display, fits well in your hand, responds quick enough for the slow CPU inside, dual SIM actually works (that's why I bought it, after all). One could argue that the resistive touch display is worse than a capacitive one - but then I remember my Motorola Milestone which regularly responds to the touch of an ear and start to actually love that resistive display of the Eclipse.
However, after a week you start learning why this device is so cheap. First of all, I confirm, it's just unusable for making phone calls. The incoming sound quality is ok, but most often people at the other end just do not hear you at all or only part of what you are saying. I have no idea why, a possible hint: yelling at your phone helps a little. Unfortunately, using a (high quality) headset does not change anything - so it's not the build-in microphone which is causing the problem. For completeness, I will try out a bluetooth headset too before getting rid of the phone.
Then, it's the first Android phone I'm using where I just cannot find the "Sound settings" and thus cannot even change the ring tone. I feel silly, but then, the small user manual that came with the phone also tells you "sound settings" should just be there. And this is not the only setting that seems to be missing (or is hidden somewhere else than on my other Androids). By the way, the user manual obviously talks about either another version of the phone or even about another phone.
BTW, Skype won't work on this phone. However, this seems to be rather a problem of Skype than of the Eclipse.
Conclusion: Its not only low priced, but unfortunately it is cheap and the incredibly low sound quality prevents it from being used as a phone.