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<p>[QUOTE=&quot;Heliodromus, post: 7912986, member: 120820&quot;]I keep photos of sales of all coin types I&#039;m interested in, together with all relevant information: size, weight, price, date sold. I have a pretty narrow interest, basically Constantine, and co-emperors, but at this point have collected a database of over 18,000 coins! It&#039;s invaluable both for pricing as well as things such as style comparisons, checking issue weights, assessing marketplace rarity, etc.</p><p><br /></p><p>I say &quot;database&quot;, but really these are just files on my computer, organized into a hierarchy of directories to be manageable and so I can easily locate types I am looking for. I use long file names including emperor, mint, date, attribution, dimensions, price, etc, which allows me to use file search to locate coins based on any of these criteria.</p><p><br /></p><p>Of course you could use available online auction records for price research too, but that isn&#039;t going to include things such as eBay, your coin club sales, or coins from other sources. It&#039;s also way more convenient to have all records in one place with consistent naming, rather than having to search in 10 different places. I also resize all photos to a standard 800 pixel width, and rotate busts to upright position if needed, both of which help doing side-by-side comparisons of coins.[/QUOTE]</p><p><br /></p>

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