Although your purchasers would doubtlessly appreciate your gesture, two wrongs wouldn't make a right in the case of advertising replicas as replicas. Most laws concerning counterfeits target the production end of the counterfeiting process, so circulating an already illegal product--regardless of how you advertise it--is dangerous.

Familiarize yourself with the policies of the United States Patent and Trademark Office (www.uspto.gov), and when in doubt, avoid selling counterfeits.