Can anyone recommend a retailer for BC coilovers for a 997.2?

I’ve seen them for as low as $850 on eBay, and at that price they’re worthwhile trying out, considering the next best alternative is 2x the price.

I never saw new ones for that price for the 997 but perhaps used ones could be had for $850. I ended up buying new from a vendor in the Midwest, but most seem to get dropshipped directly from BC so I'm not sure the vendor matters that much in this case.