What's usually for sale there? If it's stuff, they might be doing an inventory. Or if it's plants, maybe they are tucked in tight during the deep cold snap. I suppose if you were really curious you could call and ask.

"What's usually for sale there?"

Packets of seeds (packet quantities, not larger quantities)

You said the regular seed store is still running- I assume that's where packets of seeds are sold. What's usually for sale in the shop that is currently listed as closed?

The home gardener site has smaller quantities of seed available for purchase, not bulk quantities.