Conditions as follows:
Fair: well used, may be marked, may have tears, holes, or creases.
Good: used, but with no major damage, but may have a couple of small crease holes or pen or route marks.
Very Good: very little evidence of use, may have a dog eared corner, crease, or minor pen marks.
Near mint: generally with out evidence or use or any marks, may have a tiny dog ear or faint small crease.
Mint: Looks like it was never used or opened, and just stored away. May have some yellowing depending upon the acid content of the paper.
+ or -: just above or below grade respectively.
Shipping note: If letter shipping is offered (a single maps with a value under $3.50), the map will be shipped as regular first class mail in a long envelope; otherwise maps are shipped in a first class package.