I Think I Found A 1984 D (Lmc) DDO

Pennypride if your really into varieties enjoy it in the raw for awhile once its slabbed it kinda takes the edge off them. ANACS will slabbed it for $10 + $7 + shipping and insurance total around $23.00 I have about 15 variety cents in ANACS holders and in my opinion they get a bum rap as all are neck and neck with the other big 2 "NGC, PCGS". For collecting ANACS is great; for selling PCGS or NGC is the way to go.
Your coin if it grades AU-55 in a PCGS holder could possibly bring $80.00 -$100.00 at auction minus listing and sellers fees. Deduct what PCGS charged to slabb it and you end up with $45.00. For a coin like yours I say no way Jose, as you developed your skills and friends in this hobby you will start trading with other collectors as you need, want etc. and a coin like yours is great for a trade up or towards a coin you want.
Celebrate your find, I searched 2 years for mine in a crappy AUish grade and wouldn't sell it for $250.00. Any decent die variety is just plain hard to find roll searching. You got me fired up, the 84 D is pretty dang scarce, keep that baby.

Pennypride it just keeps getting better and better the more you learn. I ride the coattails of this forum and suck in the knowledge. At your age if you start now you could assemble an incredible collection by your early 30's.
Check out the 1982 strikes (7 types) that can still be found for face value, the 1960 small and large dates, and the 1974 series. The mega- RedBook will get you up and running paired with "the authoritative feference on Lincoln cents" and you can live dangerously building a collection on a limited budget. Good luck and keep searching.