Stamps – Used USA Stamp Lot. I know nothing about stamps. This is for a 1 gallon bag of Used USA Stamps. Stopped counting at 300. There’s a lot. Again, I know nothing about these. Just throwing them on to see if there is any interest! This is for a 1 gallon bag of Uséd USA Stamps. Sorry, our items are NOT available for pick-up. No additional information at this time.