You need very little bleach in a bucket to clean the items. I would say probably a tablespoon in a 3 gallon would do it. Like I said, rinse, rinse, rinse and then add dechlorinator to the water.
Purists would tell you not to use the bucket again, but after a thorough rinsing, if you used a weak solution, you should be fine. I have never had any problems. Bleach decomposes over time, anyway.
As to my babies, I don't ship. Shipping goldfish is not the same, really, as shipping other fish. Trust me, I know. I have received two very beautiful near show-quality fish dead due to bad shipping methods. It's too soon to know what they will look like. They are just starting to color, and as you know, colors aren't stable on goldfish until adulthood. The mother of the spawn was jet black as a juvie and is now a completely gold telescope. When you pick your new ones, I would tend to do so based on body shape and balance rather than coloration. Wens will start to develop at between 3-4 months. While they usually don't change completely, you can get some pleasant and not so pleasant surprises.