I bet at least some people have heard of the Time Fantasy tilesets. They are both cheap and high quality. They are currently on a summer sale until it hits September 1st.

I really like them and find them very useful at an affordable price. I will probably get them soon.

Here are the main ones: https://finalbossblues.itch.io/fantasy-rpg-tileset-pack

Here are the winter tiles: https://finalbossblues.itch.io/time-fantasy-winter

Here is their main website: http://timefantasy.net

They also have other things (monsters, characters etc.).

What do you guys think?