Is it still possible for them to restock their very very old items?

depends, what are you looking for?

Steamworks Menagerie Fashion Bag's and Wild Telenine Figurine.

the bag may show up for Masq. You could always ask ariel or amber to add the figurine back in the bhh.

thanks

When does BHH restock? I've never ever seen it RS -_-

Randomly throughout the day, one item at a time from its current stock.