I do not recommend sharing your IMEI as Nokia will reveal who you are and theoretically may sue you for selling the prototype. You should better share the photo of sticker under the battery with last number blurred or censored (see my example above) - that will make it harder to uncover your identity.
I don't get why anybody would request a person to publicly display their serial numbers and whatnot publicly and you've not done the same yourself for the most part. If you're genuinely curious, purchase it. Then you'd know.
Is there actually any point in getting/keeping an N950 for development? This is a serious question.