I’m still sold on the Frio cold shoe adapter, but this is the cheapest I’ve seen. At $4.29 with free shipping from china, I wouldn’t expect much, but if your looking for the lowest price, this is it. Before this, the cheapest cold shoe adapter I’ve found was $8.49.  I’m guessing at $4.29, shipping is at least $3, which doesn’t leave much room for profit.