I don't think the Half-Penny (bottom left) would be worth as much as $12..least not on ebay!
The one top right has got to be the One Pence produced 1797 in Matthew Boulton's Soho mint/ workshop - it should weigh about 28 grams. the orginal weight of the twopence was 56.7 grams and the One-Penny is exactly half of that - they were set originally at their exact copper value.
The bottom right one could be Liverpool (the clipper ship as Liverpool was one of the world's most famous ports, if not the most famous)- I'd say the the evaluation is about right..
Top left one Half-Penny 1806, dollar or two...very low grade
Nice finds anyhoo