you don't actually want to get right up to a person's face with your camera as the resulting picture will be distorted (it will appear more or less circular) so what you need is one where you can stand back a bit and if necessary zoom in (which doesn't have the same distorting effect). I can't personally recommend any particular model, but most cameras these days will do it more or less well, though it seems to me that few cope well with dim light. For detail you will need a decent number of megapixels, probably 5 or more, but again most cameras these days offer this. You won't get the very highest quality on that budget but there should be plenty that suit your needs.