I’ve had good experiences with Chinese wholesalers on eBay. Amazing deals if you can handle a few scratches but you can get mint, sometimes with the Apple plastic for a good bit under $200.
Here’s a slightly scratched one just as an example :
Find many great new & used options and get the best deals for Original Apple Watch Series 4 S4 Link Bracelet band stainless steel 38mm SILVER at the best online prices at eBay! Free shipping for many products!
www.ebay.com
An American wholesaler I’ve also used, with a new one:
Find many great new & used options and get the best deals for Apple MJ5G2ZMA 38mm Link Bracelet - Silver at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Hopefully the supply of 42mm on eBay replenishes. You really shouldn’t pay more than 200usd. I think they’re still pumping them out but who knows. Best Buy did a massive markdown of the black link so maybe this band style will get swept away with the modern buckle and leather loop.