.Com Domain price will go up from 1 September 2021 from US$8.58 to US$9.13 as a result of Verisign increased their wholesale price.
Applying coupon ALLABOARD when checkout will bring down the price from US$8.58 to US$6.75 which was about NZ$9.87 (as of yesterday afternoon FX Rate)
The price includes 1 year renewal on top of the existing period of your domain (I believe this is market standard).
I own several .Com domain names expiring end of this year, so I decided to renew before price goes up next month and found the cheapest one with a good reputation.
I think this is quite a good deal since this registrar includes free SSL and email forwarding too (of course, also whois privacy and DNS as almost all other registrars do)
The company review seems good on Trustpilot. (https://www.trustpilot.com/review/porkbun.com)
Please note:
It looks like the coupon code can only be used once per account. So if you have many domains to transfer I recommend you to attempt transferring all your domain names at once and applying this coupon. I did transfer one first and then regret later. :(
Upfront specials are always good (eg, lots of places will do $1 initial registration).
However, once renewal comes up, switch to Cloudflare. They charge at cost. So my last renewal was $8.03USD.
They aren't out to make any money on domains, preferring to sell you other services as you need them. Eg I pay another $5/m to them for Load Balancing but get far more value than that out of them on domain savings, their free CDN (I cname an S3 bucket, which results in CloudFlare caching my public images and reducing the impressions on AWS) as well as all of their other free services (including time saved, such as the 15 year origin SSH cert I have to my server, then their free public certs which they maintain).
They also support DNSSEC, which a lot of registrars still don't do, and automatically apply domain privacy.
The only drawback is they don't yet do ALL of the domains, so I have to keep my .hk, .nz, and .co.nz domains with another, more expensive registrar.