I have a website and get a few orders through there mostly for Isbars. Shipping the started birds is much less stressful than shipping chicks in my opinion. The day before I ship I cage them separate and feed them apples slices to get them used to them. ON ship day depending on the number of birds I put 1/2 to 1 sliced apple in on top of some shavings so they have something to eat on and give them a little moisture on the trip. After I put in the shavings, apples, and birds I seal up the box and weigh it on a kitchen scale, then print postage off usps.com. I ALWAYS select "hold for pickup" and write the buyers phone number all over the box. I never ship if the temps locally are going to be over 90-95 for the next 2 days. Also I called my post office distribution center to find out when they load up the trucks so I can time arrival to the post office about an hour before that, it's a further drive than my local post office but gets them out of town faster.
I have not used rare breeds auction yet. I would guess you wouldn't get a lot of local interest for the value of the birds. Pricing is going to depend on the supply and demand in your area of course, but to give you a reference here in Oklahoma locally I charge $50 for a 6-12 week old gold hackled pullet (and I sell them as such with full disclosure of what that means) and $75 for a cream pullet of the same age. I haven't had a lot of interest in cockerels, mostly they go to people who grow them out and eat them, but when I sell them to a pet home or breeder home they go for $15-25 depending on quality and color. When I get orders through my website those prices are higher due to shipping costs, the ridiculously expensive shipping boxes (and the expensive shipping to get them to me), and the hassle.
I too am eager for next year when the cream gene is fixed in my flock and I can move on to the next goal! I'm nearly there with the ones I am growing out, and sold two of my gold hens today.