Great find on a great piece, JJ. I'm so sorry about the breakage.

The average really doesn't change that much from month to month on most pieces, so I'm not sure it would be worth the extra effort to calculate and add that extra column every month. However, there are months when significant anomolies occur, so I'll grant that using the current month's average isn't always the best guage. Since this is not the first time that this has been suggested, I am considering doing something about it, but I probably won't do it monthly.

My current thought is to do a year-end summary once the December data are in. Then I will add the last year's average for each piece to all future charts for comparison. That will be a static column, month-to-month. I may update it annually, semi-annually or maybe even quarterly (if I feel ambitious or if significant market changes are apparent), but not monthly.

Again, my intent here never was to set prices on individual pieces so much as to take the pulse of the market overall.

Thanks for the suggestion.

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-Art