Scales the display based on your browser width or if you're browsing on a mobile device.

Site navigation icons are in the upper right; both the arrow and section name bring you back to that section, while the large A sends you to the front page.

Dark mode!  Clicking the moon icon () in the upper right will switch you to the Dark theme mode.  Your selected mode will affect the whole site (except the forums; they have their own separate light/dark switch), and remain permanently in the state you choose (you must have cookies enabled to retain the mode).  Clicking the sun icon () will return you to Light mode.

Rulebooks & Sets Index:  Lists the various incarnations of the Dungeons and Dragons rules, from the humble beginnings as pint-sized booklets to the hardcover manuals that persist to this day (albeit now with new cover art and upgraded rules).  Organized in three sections (Original D&D, D&D, and AD&D).

Modules Index:  All adventure modules produced by TSR through roughly 1989 (with a few later ones thrown in for good measure).

Periodicals Index:  The various magazines and newsletters of TSR, up through roughly 1990.

Miscellaneous Index:  Lists those game-related items that don't fit into the other indexes.  Examples: Rogues Gallery, AD&D Fighting Wheel, and the various Campaign sets (Greyhawk, DragonLance, Forgotten Realms, etc).

The Rares Index:  Lists all items with a Rarity score of 4 or 5 (see Grading Conventions).  As you can see, a high Rarity score is not necessarily equitable to an item's value (Strategic Review issues), and vice versa (the H series modules are fairly common, and thus not listed on the Rares Index - although they often fetch well over $100 each in mint condition).

When viewing the Indexes on a mobile device, the Estimated Values are hidden for formatting purposes.  To view them, click on an item's individual page and scroll to the bottom.

Help in the upper right brings you to this page.

All Index columns are now sortable!  Simply click the appropriate column header.  The currently-sorted column will have its header highlighted in glowing text.  Sorting is sticky, meaning the indexes will remain in their last sorted state even when you leave the page (you must have cookies enabled to retain the sort).

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.

Rarity:  a value of 1 (common) to 5 (rare).  See Grading Conventions.

Page Updated:  the date when any significant information on that item's page was last modified.

Estimated Values ( Fair / Good / Very Good / Fine / Very Fine / Near Mint ):  estimated value (in dollars) of an item in that condition.  See Grading Conventions.  The Estimated Values are derived from mathematical formulas applied to past eBay sales, with some (very occasional) adjustment as necessary by The Acaeum Valuation Board.  For more information, see the Frequently Asked Questions page.

Change:  A green arrow () means the values have been recently adjusted upwards; a red arrow (), downwards, by the indicated percentage.  Percentage changes less than 2% are not reflected in this column.

Values Updated:  Indicates the month and year when a new sale has been tracked by our Valuations Board.  Depending on the sale price as well as the number of previous auctions recorded for that item, the "needle" may not budge much, or at all, on the estimated values.  This is a good thing -- providing value stability from "errant" or "extreme" sale prices, while still allowing price trends to gradually affect the values.

Hovering your mouse over a row will highlight the estimated values for that item.

Hovering your mouse over an estimated value will show a popup with currency conversions for Pounds, Euros, Canadian dollars, and Australian dollars.  The conversion rates are updated nightly.

Hovering your mouse over the chart icon () on the far right will show the historical value trend for that item (from Aug 2015 to present).  These values reflect the median "Very Good" condition.  The chart is now centered below the current estimated values, with the "Very Good" value highlighted.

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 rear 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 "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.

The Logos link has been removed.  That page is still accessible from the Library, off the front page.

Auction Commentary:  Commentary on the market trend of the item.

Estimated Values are shown at the bottom.  These values are pulled live from the Indexes, and are updated at the beginning of the month (assuming new sales have been recorded).  The item's title here links to current eBay auctions.  It's not free advertising, as we've chosen not to show individual auction titles -- just a link to basic eBay search results.  While most experienced collectors use tools such as AuctionSieve to find needed items, these links may be an assist to new collectors or casual browsers.  The search results are "geo-targeted", meaning they display results from eBay, eBay.uk, eBay.au, or eBay.ca depending on your location.  By no means should you regard these searches as definitive -- the search parameters are somewhat crude, and there may be auctions that "slip through the cracks".  You should perform your own searches, using your own specific criteria, whenever possible.