My father-in-law is champing at the bit 
Me too

I think parsnips are it, aren't they? Other seed types decrease in their germination success year by year, so I don't use ancient seed, but what I do buy new depends on if I have any seed left over from last year. Some things such as tomatoes and cucumbers have so few seeds per packet that I have no choice but to buy them fresh, although tomatoes in particular would last for several years.
This year my veg seed order is short, but I seem to have added quite a few flowers. The most expensive things are tatties, onion sets and shallot sets (which seem really expensive for just 20 sets

Still, I like shallots )