Hi Matthew,

Thank you for contacting Mearto with your appraisal inquiry.
The market for American political ephemera is pretty hot right now; Heritage Auctions has been a dominant player in that market for years.
A Greeley pin with more elaborate frame sold at Heritage Auctions in 2009 for $538; the https://historical.ha.com/itm/political/pinback-buttons-1896-present-/horace-greeley-rare-1872-portrait-in-fancy-openwork-brass-frame/a/6032-47211.
For a plainer ferrotype example of the Lincoln pin, see https://historical.ha.com/itm/political/ferrotypes-photo-badges-pre-1896-/abraham-lincoln-a-fine-1864-ferrotype-campaign-pin/a/6047-47058.s
Based on the photos and information provided, and subject to examination, this is:

Two mid/late Nineteenth Century American ferryotype brass campaign pins
Horace Greeley (circa 1872) in a plain brass mount ($300-500)
Abraham Lincoln (circa 1864) with elaborate eagle crested mount ($700-1,000)
CONDITION: both appear to be in good condition
PROVENANCE: inherited
$1000-1,500 for the two together*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.