Well, I guess only you could answer that... There are only two basic types (one penny and two pence), although there are two main varieties of the penny (10 and 11 leaves in the laurel wreath). Maybe there are some other varieties? Don't know... So you might have a collection of three coins... which could be a bit pricey for the best quality. There are pattern (like prototypes) cartwheel style halfpennies and farthings, as well as proofs in various metals... but that would be a very expensive collection indeed! You might extend the idea to include other coins minted by Boulton at the Soho mint (first steam powered mint!)... so that could include the later halfpennies and farthings of George III, as well as some Conder tokens (some look like the cartwheels), some Isle of Man coins and a few colonial issues (also quite expensive I expect). Would you be satisfied?   I remember being amazed by the ones on Colin Cooke's site - they're quite beautiful.  Gilt proof farthing Silver Proof Farthing Silver halfpenny All contemporary patterns, by the way.