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Stats after 30,000 recorded sales

27 Jun 2015

So, we have reached other milestone: 30,000 recorded auction sales in the database. As of this morning, there are 30,037 recorded sales, and here are the overall statistics, with some notes on the changes since 29,000 sales.

The 30,037 sales result from 67,782 auctions started, so the success ratio (i.e., auctions resulting in a sale) is 44.31% (44.68% last time), continuing a downward trend. The number of successful auctions per month also continues to fall, and is now at 228.4, from 234 after 29,000 sales.

There are 1050 different editions and variants listed separately at Of those 975 have appeared in at least one successful sale, which is three more than last time, again a notable increase (there were four new ones last time). Of the 975 editions seen, 53 have appeared once only (again an improvement - there were 58 once-only editions last time). The most sold edition is, as ever, Great Britain 7 (1910) with 240 sales (235 last time). Generalgouvernment remains the most sold German edition and stands at 215 sales (last time 210). The best-selling French edition is also firmly established, being Sud-Est de la France 9 (1910) - but it remarkably remains on 88 sales (88 since 28,000 sales). Of the 30,037 books, 13,446 (44.8%) were in German, 12,482 (42.9%) in English and 3,697 (12.3%) in French. There is a weak trend for the proportion of German books to increase and that of French books to decrease, but it remains a steady rule, as it has from inception, that out of seven sold books, three are in German, three in English and one in French.

The total sale price for the books was €946,528.04, giving an average price of €31.51, which continues the falling trend (though it is now very slight). If all the books had gone for their BDKR guideline price, the total sales would have been €2,472,605, so the ratio is now down to 38.3%. And there was I thinking the revision of guideline prices would fix the ratio at 40%!

As ever, just treat these stats as a bit of fun - my statistics training is non-existent. The stats also appear in shortened form every day on the stats page. If you'd like some other data, please feel free to ask!

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