Our system automatically issues a Sale Notification email to the seller whenever a payment is completed for an order; this contains the order details and is sent to the seller's E-junkie Login Email address. If you need to have another party notified, you might use the Multiple Emails method for our Integration feature:
http://www.e-junkie.com/ej/help.integration.htm#emails
The seller can also receive a copy of the thank-you email sent to the buyer, which may be helpful if you only need to receive special notification for one product in particular. Just tick the box for that in the product's settings, and if it's a tangible product, be sure to put a message to the buyer in the Email Message field; you could also Enable Templated Email and use the template variables listed here to insert order details in the message:
http://www.e-junkie.com/ej/help.custom.thankyou-email.htm