Hello bittar,
Does this works for you ? https://assetstore.unity.com/packages/2d/environments/2d-rpg-topdown-tilesets-pixelart-assets-mega-bundle-212921
Thanks ! Here are some clarifications :
Itch.io bundle base price is $39.99, down to $19.99 for current itch.io summer sale. I can manage the price as I like here.
Unity bundle base price is $49.99 (a bit higher than itchio since it require a lot of work to setup the Unity package, autotiles and so on). I can't manage the price directly (well, I can, but only a few times a year). It's the Unity Asset Store who decides the sales. I may be included in the Unity summer sale too in the next few weeks but it's not up to me :).
Yes you can buy here and add the files in Unity, but you won't have the autotiles setup (which requires Fang Unity package) neither the tilepalette prepared, or the sample map. Check the lasts screenshots in the Unity store webpage and judge by yourself 👍