This seems like a huge amount of addresses to me, the price should drop if supply goes up. I don't expect it to tank though. Is there a recommended broker or w

This seems like a huge amount of addresses to me, the price should drop if supply goes up. I don't expect it to tank though. Is there a recommended broker or website? I googled a few of those "transfer facilitators" and they looked sketchy to me with many of them asking you to contact them for a price.