It's a tough one, but there is also a good chance that the same head/ face has been used many times by different people, take the Kayla head for example, the same face is used on both the silicone and ex-lite versions of the doll, and i would expect that the ex-lite version to be popular, i'm also thinking about getting one myself for on location shoots, as the weight and construction of it make it ideal to move about, so unless the new owner has specifically said no to the seller, then i would just do it anyway, especially if you have a library of unpublished photos