Among collectors, certainly not all antique photos hold eminent value. There are sure events that pictures are taken of that are worth more than others. For example, an antique exposure of a wedding party is worth more than good a random image. And of course pictures of famous citizenry such as Abraham Lincoln hold frightful value. But even wedding party pictures hold differing values, the more citizenry in the image the high the value of the exposure. I say it's an affair of amount and caliber when it comes to valuing antique photos.

Also, if the citizenry in the image seem a small more eminent family (the clothing is expensive within the time period of the exposure), then the exposure is worth a small more than if it were of a let down family house. Hardly seems fairish does it? But I think it's all an affair of detail as opposed to favoritism.