Pros: -Price is low
-More users/products availble

Cons:-Hard to get what you want. Cheap ones might run out fast. Have to keep updated with new posts.
-Time comsuming. Have to DM sellers each time and discuss price with them

Pros: -Easy to use(secondary market app like Ebay)
-Good-price cards sometimes

Cons:-Overall, the price is too high
-Hard to get what you want. Cheap ones might run out fast.Have to keep updated with new posts.
-Quality varies.

Pros: -Well built website that’s made for selling photocards
-Saves time

Cons:-The price is too high

Pros: -Physical record shops sometimes sell phtotocards seprerately
-Easy to get. Price transparency

Cons:-The price is usually high
-Products are usually very limited

Pros: -Price is low
-More users/products availble

Cons:-Hard to get what you want. Cheap ones might run out fast. Have to keep updated with new posts.
-Time comsuming. Have to DM sellers each time and discuss price with them

There are secondary websites/apps across the globe(China, Japan, Korea...)

However, the delivery fees might be very high.

You might only need them when you want a specific photocard that only sells in that country.