No markings on reverse side, cover was never sealed

Postage is only $1.00 USA, ($1.50 Outside USA- up to 5 items- will charge actual postage spent on larger orders) no matter how many items you buy!   You can build up your purchases up to 3 weeks.  When you wish to pay, please message me for an invoice so I can be sure you are charged the correct postage.  eBay has a habit of overcharging!   Thank you!   Tom