This is an outstanding source for seed. And, it can save you a lot of money. You can often receive or swap seeds of those hard to find varieties that will make your garden stand out from the rest. Many avid gardeners will cultivate this source of seed from friends, relatives, neighbors and fellow growers each year long before they they cultivate their gardens. It makes for a great winter hobby.
Many growers believe that plant disease can be spread from seeds.
Keep this in mind when acquiring seed from fellow growers. Don't let this deter you from getting seeds from others. Ask about the health of their crops. If they have had recent problems, you may want to decline. Try an online chat room.