Do the following
Add this to your 'main.css'
.price_asterisk:before{font-family:"FontAwesome";content:"\f069"; padding-right:5px; color:#C00}
On your 'item-post.php', find the line '<label class="control-label" for="price"><?php _e('Price', 'bender'); ?></label>' and replace it with '<label class="control-label price_asterisk" for="price"><?php _e('Price', 'bender'); ?></label>'
Regards