I don't mean to take the wind out of your sales, but most collectors would never tie up $1000 in a F $1000 Lawson Bouey note. Remember that note is worth $1000.00 (which can be used to buy so many more impressive notes). If you were to take it to a show, or to a local club with paper money collectors, it would hardly be worth a passing glance. The condition is too poor (which I think you graded quite correctly-- but it also has staple holes) to be sellable. The Charlton guide may say that a note in fair condition is worth $1050, but this is a very generous estimate, which is idealistic, and not too realistic in today's market. Just try to find a buyer! Even $100 to $1000 notes in VF ot EF are not easy to sell (unless exceptionally rare-- which this is not), and end up costing the seller considerable fees if he tries to sell it online. This note may have high personal value to you (left to you by your grandmother) but it would have very low personal/investment value to anyone else.
My advice to you (if you wish to take it) is to use that money to buy some rare lower denominations.
One thousand bucks can buy a great "starter collection."
Here is a good general rule of thumb you can count on: First, look at your collection in terms of investment value (IV) and personal value (PV). The key is to find a "happy balance." Notes that have high IV are UNC, rare, and easy to sell. Notes with high PV are notes that are valuable to you (eg: birthdate, special numbers, 3- 4 dig radars, found/character notes, UNC common sequential notes, variations or anomalies, etc).
Next, consider notes in terms of condition (from low VG, medium VF to high UNC) Although the IV and PV of your collection are concepts that are related, they're not necessarily equivalent. An UNC 3 digit radar might be meaningless to me, but if it can be made into a set for another collector, it would have high PV to them. Most affordable notes have a bit of both but you can get a lower graded note (with less IV) such as a Fine 1937 narrow panel $1.00 H/A for $150 and you would do well. That's because its an easy note to sell. Plus it would leave you with $850 to invest in other notes.
A good investment note could also be a $50 devil's face in UNC, but that would wipe out your $1000 (plus some change) in a single transaction. Your collection would consist of only 1 note so the personal value of your collection would be less (you have less to take pride in). So the idea is to balance your collection with good personal value and investment value notes while always trying to get the best condition you can afford. If you start with lower denominations you can get a good (AU to UNC) note of each Devil's face, and still have cash to purchase Modified, and subsequent (or earlier 1937) series.
Arm yourself with information. If you're unsure what to buy: ask someone you would consider fairly knowledgable (perhaps, but not necessarily, a dealer). You should set yourself some goals (ie: to fulfill a certain set of notes, going up to a specific denomination - ten$ or twenty$ is best when you start)
Tune into CPMF (as you're doing), get yourself a Charlton (at the library-- then eventually buy one), go to a coin shop (to buy some note holders/pages) and shows, and trade your cash for large amounts of lower denominations at the bank. Discover today's notes (what's hot what's not) and try to get them in the best condition you can afford. Keep searching for notes and learn which ones are worth keeping. You may have a few rare finds. You also may want to try online auctions, and buy from established members/sellers here on this site.
Good luck!