Make sure the framer you visit really knows what map preservation is all about and what he or she will do what's necessary to protect your antique map purchase.
Of the over 30 years I have been in framing, it amazes me how framers treat, mount and frame art and artifacts for people who patronize them. On a weekly basis, it's not unusual for someone to contact me through email or phone informing me of a recently framed item which shows signs of deterioration.
The following map, over 400 years old, is a case in point. Although erroneously titled "Virginia", it's really a incredibly accurate likeness of North Carolina. Of course, shortly afterwards, Virginia was given the correct depiction when the cartographers mapped it thoroughly and accurately.
As a seasoned collector of autographs of over 35 years, it still excites me to pick up long desired rare autograph signed by someone I admire. You see, unlike most things, a complete set of autographs cannot be acquired any day or night. It has to be built over time or acquired intact when the rare opportunity presents itself.