701—18.19 (422,423) Antiques, curios, old coins or collector’s postage stamps. Curios, antiques, art work, coins, collector’s postage stamps and such articles sold to or by art collectors, philatelists, numismatists and other persons who purchase or sell such items of tangible personal property for use and not primarily for resale are sales at retail and shall be subject to tax.
	 18.19(1) Stamps, whether canceled or uncanceled, which are sold by a collector or person engaged in retailing stamps to collectors shall be taxable.
	 18.19(2) The distinction between stamps which are purchased by a collector and stamps which are purchased for their value as evidence of the privilege of the owner to have certain mail carried by the United States government is that which determines whether or not a stamp is taxable or not taxable. A stamp becomes an article of tangible personal property having market value when, because of the demand, it can be sold for a price greater than its face value. On the other hand, when a stamp has only face value, as evidence of the right to certain services or an indication that certain revenue has been paid, it shall not be subject to either sales or use tax.
This rule is intended to implement Iowa Code sections 422.42(3), 422.43, 423.1 and 423.2.