These seem to be all blocks of 4 minimum. The lot pictured is what you will get. There is of course a lot of duplication.
These are intended for letters and parcels and the gum is perfectly fine for that. They have not all been inspected for flaws like bumped corners/edges, small tears, surface scuffs/marks, pulled perforations, gum glazing, leftover hinges, flaws from hinge removal, etc. And of course in lots like this, sometimes a very few with no gum or used will accidentally be included. But the vast majority will be in collectible mint condition. BIN at 64% of face.
I use stamps on my parcels. If you have problems of any kind, please contact me directly and I will do my best to rectify. The item "DISCOUNT POSTAGE $300 face @ 64% US mint 1500x 20-cent stamps free shipping" is in sale since Tuesday, September 11, 2018. This item is in the category "Stamps\United States\Postage".
The seller is "efs" and is located in Flossmoor, Illinois. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, New Zealand, Philippines, Singapore, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica.