These are some the large true spiders. They are beautiful and not dangerous. They are called Golden Silk Orbweavers because their silk is a goldish yellow color.
Look for large webs with them sitting in the middle of the web. Typical Orbweaver beavivior.
Males are much smaller than the females. Notice in the following image how the male is much smaller than the female.
In the Southern United States, look during the summer months, especially around June and July.
Younger specimens seem to be brighter in color.
Desire to flee, not defensive
From the Southern United States to Uruguay, South America
They would be difficult to keep because they require such a large space. Consider keeping them in your backyard only if they are native to where you live.
Find them or purchase online
Price: $60 maybe
***This list is subject to change***