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