I was wondering what the value of my 1804 half cent is. It is the C1 variety with a major die break on the reverse going from the rim of the coin between the T & E of States through the F in Half and stopping at the A in America. It is in what I would consider VF and has nice smooth surfaces, but has been counterstamped or punched. I don't know if the marks on the right side of the coin's edge on the obverse and reverse are mint errors or just damage to the coin. I am currently selling this coin and several others on ebay. ( http://search.ebay.com/_W0QQsassZguthormsen2QQhtZ-1 )
with the damage to the obverse and reverse and the rim dings (dents) I would probably value this somewhere in the $40-60 range, unless this is a major variety. Then You might be able to get more than that if there is a half cent specialist that wants it.
The 1804 Cohen 1 is an R.3 rarity with an estimated population between 200 and 500. It is the most common of the crosslet 4, (stems C1-C4) varieties. The reverse die crack (and faint lettering to the upper right of the die crack) is characteristic of Cohen's "second use" die state. Manley's book on half cent die states could give you more information. I'm afraid that the marks you mention are damage as Cohen's photographs don't show them. The 2010 Redbook pricing for this variety is: AG-3 G-4 VG-8 F-12 VF-20 $40 $70 $90 $120 $190 Since your coin has been counter-punched, its value will take a large hit (sorry for the pun).
Thanks for all the info.:thumb: I thought the dings in the rim were damage, not errors. It seems that most of the coins I have in my collection have condition issues. Most of them are corroded because I dug them out of the ground, and I also have a fairly large collection of holed coins.