How Do I Find A Buyer Interested In Error Coins?

Hello,
I reverentl became intersted in coins, coin history, and my nLincoln's face all. I still have lots to learn. I'm really getting a kick out of the fact that I never liked history, til about 4months ago I came across a weird coin, researched it, and got researchIm not looking to get rich, I like the idea of have possession my own little historial ow if I do in fact have in my possession a real treasure and not just funny looking coins lol. With that said. How do I know my coins have true value, and the collector's attention?

NOTE: I will post pictures later because my camera is bad :(
But I will provide as much information as I can.

#1- 1990 ( no mint mark) red penny OBVERSE: shadowing on the right of lincoln's face all the way down to his neck, 3 tiny engraved letters on the left bottom of Lincoln's suit, and some faint numbers above the year 1990. REVERSE: engraving of "fg", faint "A" on after at the end of the word AMERICA, and a raised border like line creating in the middle of the words AMERICA and CENT.

1983 penny- OBVERSE: no mint mark, a small 8 in 1983, a raised bumpy border (only on liberty side of coin), a cluster of bumpy dots above year, 3 letter engraving is there, and double earlobe. REVERSE: "fg" engraving, double E on the word STATES, and a "P" above the B of the word PLURIBUS (it could be a P or B), and also there's doubling on the S of the word PLURIBUS.

I also have this 1965 Washington quarter no mint mark with a faint but readable year of 1895?! lol and very copper color, "IN GOD WE TRUST" ("I" is overlapping N), and under the word TRUST is a very clear number 25. REVERSE: in the word UNITED "N" is overlapping "U", and rright eagle wing is double.

Have lots more that will share later. But first see if anybody can help me with this :)