All seeds are fresh and recently harvested.
Viability of seeds should be very high but that also depends on your skills.
Some seeds are very very small, dust like, so it will seem like you bought empty zip bag. Don't worry, you will see small seeds. Try to find fine sand and put it in bag with seeds and shake it so seeds are mixed with send. Then sow it all together with sand evenly, otherwise it may happen to drop all of them on small area.