I'm afraid i don't sell on the US
Ebay, only the English
Ebay.
I don't usually photograph chicks as i normally hatch around 150 each year and the cull rate is very very high with Blues. I have some photos of young birds, but the only way to tell how good a bird will be is to wait until nearly fully mature. Everything from size, type, colour, lacing, eye colour and comb shape can change through every period. Usually there will be a couple of birds that stand out from a very young age and mature into what you expect, but the majority change far too much to predict from a young age. I found taking pictures of chicks through out there development a waste of time as they can't really help you predict how birds will turn out.
If you are looking to breed to the English standard, the best advice i could give you would be to keep an eye on ground colour. Over here we are looking for light ground colour with strong lacing. The darker blues are unshowable and usually not worth breeding as they throw a lot of dark birds which can't be used in the show pen. Also, tails to me are very important. A lot of males have terrible tails which are too long and make the birds look uneven. Another fault is a gap at the top of the tail where a feather never grows. For me this can completely spoil a very good bird. I've noticed it in a few photos in this thread.
The best thing is there seems to be plenty of people interested in Blue Orpingtons in the US. They should be improved very quickly. Over here, there aren't that many people breeding Blues and they are struggling a little in numbers. At our main shows there aren't usually more than 20 large Blues. There are no more than 3 breeders, including my self, breeding more than 50 a year over here and i feel that is the minimum needed to be able to select well and improve.
I don't think I'll be able to post any photos until the start of next week, but I'll look forwards to seeing plenty of photos from you guys and if you want my honest opinion, i will give it!
Matt