Thank you for your question. The panels we offer may be primed or unprimed, and we indicate which on the product page on our website. What you're describing sounds most like the Ampersand Gessobord, which is a toothy but not overly textured surface, and ready to paint.
If you type "Gessobord" in the search on our website, you'll be taken to a page which lists all the sizes and prices. If we can be of further assistance, just reply to this post. Or, you can email [email protected]
or call 1-800-933-2542 (weekdays 8am - 5:30pm CST), and we'll be happy to assist you further.