I'm one of those who has tended to rely on Ebay and not used Etsy enough.

What I have used Etsy for finding people who make custom/bespoke garments.

I have a waistcoat, three tweed hats, and two bow ties from various makers I've found on Etsy. It's great for that!

What I under-use Etsy for is finding vintage things. I do have a vintage Brooks Brothers bow tie from Etsy.

I'll have to check out their sporrans sometime!