If you are also using the v4 space to facilitate  IPv6 you can get some space from ARIN via the 
4.10 policy. 

https://www.arin.net/participate/policy/nrpm/#4-10-dedicated-ipv4-block-to-facilitate-ipv6-deployment

On Wed, Aug 4, 2021 at 23:35 Alex Wacker <alex@alexwacker.com> wrote:
Ipv4.global is very reliable. I’ve sold blocks there

On Thu, Aug 5, 2021 at 1:28 AM james jones <james.voip@gmail.com> wrote:
hey everyone,

Been a while since I had to deal with NetOps stuff. Was wondering, where do you go these days to get IPv4 blocks? It seems like getting assignments is hard due to exhaustion. I have found some "Auction" sites but it all feels very scammy. Any info would be appreciated.


-James