KDP categories · Top KDP authors
Marbles: Amazon KDP category data
Amazon Books Best Sellers data for Marbles, updated Nov 2, 2026: median price $21.95, median 7 reviews, average rating 4.2 and a KDPTop opportunity score of 24/100 (highly competitive).
| Price range (middle 50%) | $16.42 – $42.43 |
|---|---|
| Average rating | 4.2 |
| New releases (90 days) | 2% |
| Books on the list | 62 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category Antiques & Collectibles (704), one of the easier corners under it.
- Only 2% of its best sellers are under 90 days old, fewer than in 94% of Books categories: established titles hold the list.
- Its review barrier is lower than in 87% of Books categories: the median best seller has only 7 reviews, so new books can chart with few.
Top 10 Marbles best sellers
-
Marbles Identification and Price Guide
by Robert Block
- List rank#1
- Price$18.59
- Rating4.6
- Reviews971
-
Contemporary Marbles: Art and Artisans of the 21st Century
by Mark P. Block
- List rank#2
- Price$51.14
- Reviews-
-
What Is a Friend and How Can I Be a Very Good One?: A Children's Book That Teaches Friendship Skills of Respecting Friends' Choices, Offering Help, Mending Friendships, and More! (Making Friends!)
by Stephanie Chan
- List rank#3
- Price$16.42
- Rating4.8
- Reviews70
-
Collecting Marbles: A Beginner's Guide: Learn how to RECOGNIZE the Classic Marbles IDENTIFY the Nine Basic Marble Features PLAY the Old Game of Ringer
by Richard Maxwell
- List rank#4
- Price$16.95
- Rating4.5
- Reviews348
-
Marble Collectors Handbook
by Robert S. Block
- List rank#5
- Price$16.95
- Rating4.6
- Reviews178
-
Collecting & Identifying Marbles for Beginners 2026: From Ancient Clay to Art Glass: Grading, Pricing, Sourcing, and Much More
by VIOLA J. HARRIS
- List rank#6
- Price$20.99
- Reviews-
-
Collecting Early Machine Made Marbles from the M.F. Christensen & Son Company and Christensen Agate Company
by Robert Block
- List rank#7
- Price$24.95
- Rating4.7
- Reviews44
-
Popular American Marbles
by Dean Six
- List rank#8
- Price-
- Rating4.7
- Reviews38
-
American Machine-made Marbles (A Schiffer Book for Collectors)
by Dean Six
- List rank#9
- Price$29.95
- Rating4.7
- Reviews53
-
Marble Mania
by Stanley Block
- List rank#10
- Price$34.99
- Rating4.6
- Reviews107
FAQ
Is Marbles a good niche for Amazon KDP?
Its KDPTop opportunity score is 24/100, which makes it highly competitive. The median best seller has 7 reviews and sells for $21.95.
How many reviews do you need to rank in Marbles?
The median best seller has 7 reviews, and 91% of them have fewer than 100.
What do Marbles best sellers cost?
The median price is $21.95; half of the best sellers are priced between $16.42 and $42.43.
Can new books break into Marbles?
2% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.