The voice market has two distinctive types of providers: Voice talents that are members of the unions (union talents), and voice talents that are not part of the unions (non-union talents).
Non-union talents rates tend to be the most affordable ones. Rates vary a lot as there is no market regulation. It all depends on the agreement you reach with the voice talent or voice producer. When you post a project on Voice123, non-union talents will give you quotes of their rates, along with demos of their work.
Union talents charge union rates. Although the rates depend on the union to which the talent is affiliated (SAG, AFTRA, etc.) they all tend to be similar. Union rates are usually more expensive than non-union rates.
"There are some talents that charge rates well over any union or non-union standard. This is usually the case of celebrity-talents. These well-paid talents are likely to be union talents. People is willing to pay more for them because their voices are widely popular.
Some voice over talents can also do post production work themselves (like adding background music, special effects, etc) so that you save time and money. We call these talents ‘voice producers’. Most of this type of of post-production work is not regulated by unions. As such, rates of post production work will always depend on the agreement you reach with the voice producer. When you post a project on Voice123 for post-production work, voice producers will give you quotes of their rates along, with demos of their work.