• Code:  the code assigned to the module by TSR, if any.  If present, this code is found in the upper left corner of the front cover, and identifies what series the module or accessory belongs to.  Clicking a module code on the index will take you to that item's individual page.
   
• Title:  self-explanatory.  Clicking a title will take you to that item's individual page.
   
• Updated:  the date any information on that item's page was last modified; a yellow highlight indicates a recent change.  This date does not indicate when an Estimated Value was updated; changes in those values will be indicated by arrows, as noted below.
   
• Rarity:  a value of 1 (common) to 5 (rare).  See Grading Conventions.
   
• Estimated Values ( Fair / Good / Very Good / Fine / Very Fine / Near Mint ):  estimated value (in dollars) of an item in that condition.  See Grading Conventions.  A green arrow () in the "+/-" column means the values have been recently adjusted upwards; a red arrow (), downwards.  Yellow highlighting will only be seen in this section when the item is a new addition to the index.  The Estimated Values are derived from mathematical formulas applied to past eBay sales, with some adjustment as necessary by The Acaeum Valuation Board.  For more information, see the Frequently Asked Questions file.

Each item listed on the various Indexes also has a page of further detail, accessed by clicking on the Code (if applicable) or the Title.  These pages have the following sections:

• General title, author, and trivia.  Self-explanatory.  If available, an "Expanded Description" button brings up a page containing various identification codes, copyright date, author, and a descriptive paragraph (taken unedited from the item cover).
   
• Printing Information:  Early TSR items often had distinguishing characteristics between printing "runs".  Happily, these allow serious collectors to discriminate.  Cover scans of the items are either aligned along the right side of the page, or displayed in rows beneath the printing information.  A "Logos" button allows quick reference to the TSR Logos page, while a "Foreign Editions" button (if available) describes foreign versions of the item.  The myriad numbers that TSR used on books and modules, which can further assist in determining a printing's sequence, are defined here.  Also note that the vertical size of TSR modules, as well as the color of the cover, often varied slightly over time with different print runs.  We've decided not to discriminate printings based on these size and color variations, unless they are significant.
   
• Auction Commentary & History:  A sample of recent eBay auction prices, along with commentary on the market trend of the item.  The sale prices should not be confused with the Estimated Values listed on the Indexes (which are compiled and determined by The Acaeum Valuation Board) -- the sales listed here are updated by myself, and generally only for rare items.  The item's title is listed, followed by the condition reported in the auction (or as close as I can determine), the selling price, and the month/year of the sale.  As with all things numerical here, please use this section as a guide only!  There's no guarantee that every sale of a rare item will be listed here, nor that an average of the sales listed will necessarily jive with the Estimated Values on the Indexes (which take many more factors into consideration).  These auction histories are primarily based on eBay auction results, since eBay is (by far) where the majority of RPG trades are conducted.  Private sales are almost never included in the Auction History, since verification of the sale can be problematic (and private sales, being outside of a "competitive bidding" arena, may not accurately reflect the true open-market value an item).  For more information, see the Frequently Asked Questions file.

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