I'm by no means a professional domainer, so take my opinion with a grain of salt.
Recently, despite consistently increasing 3character.com base valuations year by year, sale prices that I've personally witnessed for CCC.coms have been down even from a few years ago. This is entirely anecdotal, however I have a slight obsession with CCC.com domains (I buy them to keep, not resell, kinda like a coin collector lol) so I have been watching prices (mainly actual sales - not asking prices) for years. My observation is that while they're really cool to have, very few are actually of value to companies - especially ones that don't pass the "radio test."
Looking at your domain, it has 2 things going against it right off the bat:
1. It fails the radio test. People would go to "83.com" if your elevator pitch or advertisement didn't explain or show the characters.
2. NLN domains typically have a very limited audience given you will rarely find anyone whose company name can be abbreviated starting and ending with a number.
However, it still is a short domain, so there's a little bit of liquidity there.
These types of domains are typically bought and held onto by domainers, whether that be for novelty value or for hopes of one day selling them. This can be demonstrated by typing any 3 characters that aren't LLL or NNN into your browser and checking if the site is developed. You'll likely not find a single one for a while, but instead mainly Sedo landing pages, "This domain is for sale" messages with a contact form, and the likes.
Given that companies and brands are the ones that have money, in my opinion it's important to always base the value of a domain through their eyes and never through the eyes of a domainer or collector.
With that being said, in my opinion, the values are as follows:
Domainer: USD $235 - $450
* End-User/Company: USD $700 - $1350
* You're much more likely to sell to a domainer than a company. The end-user valuation is mainly because your domain is a number in scientific notation, so there's a market within the mathematics, engineering, and science/chemistry fields, possibly for a storefront or forum.