The listing, USA FDC Project Mercury stamp 1962 has ended.
USA Project Mercury stamp (1962) on a first day of issue cover
Condition: First day of issue postmark, unaddressed/not mailed
GIN of 4,500 is available...
I have only several of these, the scan is representative of what you will receive.
Shipping will be via standard first class mail (#10 business envelope) with a stiffener. Regular 1st class mail postage is free, but if you want tracking, you will have to pay extra for this ($2.54 for 1st class tracking within the USA, no tracking available outside the USA).
My general terms for stamp-related Listia lots can be found here (please read, it answers a lot of basic questions):
http://listiarules.webs.com/