If you search on Amazon for Darkover Anthology, you will find the anthologies from 11 to 19 (can't find 12), priced $0.99 except for the last 2 which are priced $2.99.
A very good price, can't go wrong if you still remember and like this series.
11) Marion Zimmer Bradley's Darkover (Darkover anthology Book 11)
https://www.amazon.com/gp/product/B0...oreType=ebooks
13) Music of Darkover (Darkover anthology Book 13)
https://www.amazon.com/gp/product/B0...oreType=ebooks
14) Stars of Darkover (Darkover anthology Book 14)
https://www.amazon.com/gp/product/B0...oreType=ebooks
15) Gifts of Darkover (Darkover anthology Book 15)
https://www.amazon.com/gp/product/B0...oreType=ebooks
16) Realms of Darkover (Darkover anthology Book 16)
https://www.amazon.com/gp/product/B0...oreType=ebooks
17) Masques of Darkover (Darkover anthology Book 17)
https://www.amazon.com/gp/product/B0...oreType=ebooks
18) Crossroads of Darkover (Darkover anthology Book 18)
https://www.amazon.com/gp/product/B0...oreType=ebooks
19) Citadels of Darkover (Darkover anthology Book 19)
https://www.amazon.com/gp/product/B0...oreType=ebooks
Plus:
Rediscovery
https://www.amazon.com/gp/product/B0...api_tkin_p2_i4
The Sword of Aldones
https://www.amazon.com/gp/product/B0...api_tkin_p3_i0
The Heirs of Hammerfell
https://www.amazon.com/gp/product/B0...api_tkin_p3_i6
Not Darkover
Warrior Woman
https://www.amazon.com/gp/product/B0...api_tkin_p3_i9
Night's Daughter
https://www.amazon.com/gp/product/B0...pi_tkin_p3_i10
Not yet replicated on Kobo. Do not know if replicated on BN.