This is worse than the various seed that I happen to collect at work. It is worse than the seed of various species that I brought back from Oklahoma. These are seed that I purchased online and then misplaced . . . for a few years . . . or actually several years. Some were already old at the time, so are about a decade old now. There are leftovers from seed that were sown in 2010.
There was not much expense involved. Back then, they were even less expensive than they would be now. Those that I got a significant volume of were purchased mainly because they were so inexpensive. I figured I could find homes for the surplus that grew from them later. Most of the seed were purchased from eBay. Some were randomly collected for free from my job sites.
With few exceptions, these seed are not remarkably rare. Some are common within the regions from which they were obtained. Some are in small batches of only a few, while there are more than a hundred or a few hundred of others. There are seed for several palms, many yuccas, all but one of the North American firs, and all of the North American spruces. Not all are pictured.
Neither the expense nor the scarcity of these misplaced seed is a problem. What bothers me is that after so much effort to acquire them, and after so many others put the effort into sending them to me, and after the parent plants put their effort into producing all these seed, they were wasted. As I mentioned about the palm seed yesterday, few are likely viable after a decade.
Nonetheless, all will be sown. Even if none germinate, it will be more tolerable than discarding them without trying.