What is value of Norman Rockwell bradex number 84-R70-3.8?

$20 approx per plate. Will go up.

this is the site for all plates prices

Words&submit=New+Search">http://www.gallerymarketinggroup.ca/searchkey.cgi?rad=series&search_txt=84-r70-3.6&options=Any+Words&submit=New+Search