Note, those lists of brokers are not vetted for quality. They filled out a form, agreed to certain terms, and paid a fee to be listed. 

Do your research and ask for referrals.  

On Thu, Aug 5, 2021 at 07:51 Hank Nussbacher <hank@interall.co.il> wrote:
>         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

https://www.ripe.net/manage-ips-and-asns/resource-transfers-and-mergers/brokers
https://www.ripe.net/manage-ips-and-asns/resource-transfers-and-mergers/listing
https://www.ripe.net/manage-ips-and-asns/resource-transfers-and-mergers/transfer-statistics/within-ripe-ncc-service-region/ipv4-transfer-statistics

-Hank