I can't speak to how all transactions are conducted, but there are auctions on one marketplace, IPv4 Global auctions, with cost per IP in the $50-60 range https

I can't speak to how all transactions are conducted, but there are auctions on one marketplace, IPv4 Global auctions, with cost per IP in the $50-60 range https://auctions.ipv4.global/ https://auctions.ipv4.global/. I also really enjoyed Flyio's blog post about acquiring addresses https://fly.io/blog/32-bit-real-estate/ https://fly.io/blog/32-bit-real-estate/