Custom maps for web sites (regardless of content and style) are always priced by quote.
As a guideline, most single images are in the $40 - $50 range with a significant price break given for multiple images. The final price is usually determined by your content and deadline requirements, with highly detailed images running much higher.
We accept all major credit cards, and that is our preferred method of arranging payment on all orders under $2000.
Note that no work is billed until you approve the final image(s). If needed, we will invoice recognized companies with a supplied purchase order. Electronic transfer of funds is agreeable.