I plant what I think I will eat during the year plus a few extra to account for slug damage. I end up with packets of seed that are used for 3-4 years at which point they get replaced, so it works out the same anyway, you either throw away excess seedlings or excess old seed. For amateur gardeners 200+ seeds is unnecessary, what we need is a way of buying just the amount of seed you want, say, like the equivalent of the pick'n'mix.