I think you both (buyer and seller) want to make sure that you think you own the same thing, amount, etc.
I would request to see an offer in terms of $/NRA and number of NRA. Or NMA if you are unleased. And see if that agrees with what you think you own. Or what you are currently being paid on.
Then I would try to determine if there are things that you don’t know about that would make your acreage be worth a lot more than you might think it is worth . Simple way to do that perhaps is to ask people here if there is any activity on your acreage or nearby, or just ask people what a reasonable price is to sell in your specific acreage. End of the day nobody here can tell you if its a good idea to sell or not sell for your specific situation (they might anyhow), but they can probably tell you if the pricing is within the range of the market.
It’s always a decent idea to have a lawyer or landman read over the offer letter and make sure nothing is out of whack, but that may not make sense if you are talking about a very small amount of $.