They paid about $50k for ch.at. I have a single letter country code domain (3 characters total, x.xx). There are still some single letter country code domains available to register, you could get one for under $1k USD if you want one.
There are still quite a few XX.XX left, but mostly just under obscure cTLDs (unless you are willing to consider IDN/Unicode domains under .ws or similar)
i hold a good 2 letter Chat domain: hi.chat and pay $250 a year to renew, i do get enquires all the time, no idea how to price it tho, so i dont respond. Anyone have any ideas how to go about evaluating it?
If you have a lot of inquiries - start responding with ridiculous prices (whatever ridiculous means to you.. 100k.. 1kk, whatever). Answer different price for each new price request. People either agree, stop talking or start negotiating down. After 30 emails I bet you will have some idea about how much you can sell it for.
One simple thought - it’s just an email answer, not a contract/obligation that you have to sell it at particular price, you can change your mind at any time.
I mean, ch.at is a incredible domain hack. But not sure it's worth millions. If it was ch.com could get mid six figures and up. But either way absolutely amazing domain.
Here’s a reseller with a variety: https://1-single-letter-domains.com/
These guys run a bunch of services on x.xx domains: https://o.ee/services/ like c.im, r.nf, p.lu.