[abxyz]

They’re not that valuable. There are a lot of domains from the 90s that you can pick up for cheap. All 4L .coms sold out in the mid 2000s and on the open market they typically start around $350 for junk letters and go up from there. The OP probably paid under $1500 for this domain and I’d guess they bought it recently.

3L.com domains start at around $10k for the worst letters and go up from there.

2L.com start around $500k.

Add in numbers and the price falls substantially. You can pick up 2 letters + 1 number (e.g: b0w.com) for under $500.

[nikanj]

Where should one head if they wanted to get a short domain like that?

[abxyz]

Marketplaces like atom.com, sedo.com, aftermarket.com, namecheap.com/market etc. have domain names priced for "end users" which means you'll probably see quite high prices (but you can often negotiate down).

The best deals are from expired domain name auctions which is where domains like b0w.com sell for under $500. You can participate in auctions at auctions.godaddy.com, snapname.com, namecheap.com/market, dropcatch.com, catched.com, gname.com etc.

You can use namebio.com to find historic domain name sale prices which will help you get a sense for the values.

expireddomains.net has a complete list of all expiring domains and where to participate in the auctions.

GoDaddy has tens of thousands of expired domains going up for auction each day: you can filter by length and extension. The world of domains is complicated but if all you want to do is get a short domain for cheap then check the GoDaddy auctions each day and wait. prfu.com, exfh.com and zpun.com are ending in a few hours and will likely end under $500.

The person who linked you to josj.com is confusing things: domains can be leased but that's very uncommon, leasing domains is a bad business to be in. josj.com ever finding a leasee at $500/month is a fantasy. List prices are rarely the actual value. Lease-to-own is more common but separate (lease-to-own is essentially a payment plan).

[fragmede]

the domain itself. eg josj.com (picked at random) is available.

[nikanj]

Ah, those were monthly prices for leasing the domain, not prices to buy? At least josj.com is offering a monthly plan

[throwaway290]

Is this even legal? All those IANA rules about identity verification and then you just lease it to whoever