Interesting pair of Congo covers one from the ex-Belgian congo (Leopoldville); registered cover to Canada with customs marking and space and olympics topical stamps; the other a 1980s airmail cover from the former french Congo  to East Germany, with bird topical issue, Scott 555. 

Your satisfaction is guaranteed. APS member since 1992 and ebay seller since 1996.  I am an accredited APS dealer member (Matthew Liebson, PaperHistory LLC).  This material is from a collection formed by well-known postal historian and author Ken Lawrence.  See additional auctions under IDs paperhistory and budgetcoverbox.  Please consider joining the American Philatelic Society!

Ohio customers pay 8% sales tax.  I combine shipping on won items but please aggregate things and pay in a single payment to save multiple paypal payments.

$1 domestic shipping for this item/$2 international for items under $50.   30-$50 (or over $50 international) I will use a cardboard mailer for domestic.  Over $50, shipping is $4 and tracking is included for domestic.  I use at least one current stamp on virtually all outgoing mail.  If you'd like tracking or the cardboard mailer on a less expensive item, or upgraded shipping (priority, express, extra insurance, etc.) on an expensive item, please let me know and I will invoice you for the additional cost.   L#paperhistory