Check the listing for details. 2011-20c "Aging Together" Reverse Offset Error / EFO Mint NH. Listed at 49.99 USD. 2011 - 20c "Aging Together" Reverse Offset On Gum Mint NH Beautiful Reverse Offset Mirror Image Shown With a Normal Copy on Right (Included) These Occur During Production When a Sheet Misfeeds Into The Press. The Bottom Feed Roller Then Picks up the Ink Impression, and The Next Sheet/s Is Then Printed in Reverse On The Gum Side. Post Office Fresh - Pristine Would make an excellent addition to your EFO / Error CollectionAPS # 145979 PAYMENT TERMS/OPTIONS:I accept PaypalPlease combine multiple purchases into one payment to save on shipping.Satisfaction Guaranteed, 14 day return policy if not satisfied SHIPPING TERMS/OPTIONS: Shipping in the U.S for items from $.01 to $75 = $1.00$75.01 to $200 = $3.00$200.01 to $500 = $5.00$500.01 and up = $10.00 Oversized items will be an additional $2.00 above the regular shipping costI will combine shipping on multiple items. The above shipping costs include either certified or Insured mail for orders over $75 International shipping is $2.00 up to $75 Oversized items will be an additional $2.00 above the regular shipping costAdd an additional $13 (required) for orders over $75 sent by USPS Registered First Class International mailOrders over $250 will ship via USPS Priority Mail Express for an additional $40 All of the above costs can be waved (or adjusted down) at my discretion and for known International customersIf unsure of S&H cost please email me for a quote. Powered by SixBit's eCommerce Solution