How do I set a realistic target price?

Take into consideration the time and effort you put into creating your work. Set a reasonable price for what you are offering in your request terms.
There is a maximum and minimum price you can set for your request terms, and to prevent fraudulent payments, we may set a lower maximum price depending on the status of your account.
The limit on the maximum price will be lifted after you complete a number of requests.

It is always up to the creator as to whether or not they accept a request among those received.