u/Croakin

Source : TCGIndex

Source : TCGIndex

Source : TCGIndex

Are you having some profit ? Source : tcgindex

And people are still buying, it has no sense for me. Am I alone ?
Source : TCGIndex

Source : TCGIndex

Impressive, I thought it would calm down like most of OP sets, but clearly it's starting a new positive trend.
Source : TCGIndex

Here's the conclusion :

- OP09 is constantly going up for the last months. Clearly not the case for OP13 (and almost all the other sets, they are all on a downtrend).
- OP11 same : constantly going up for the last months. I was surprised cause it's not that hard to find depending on the country.
- OP12 is starting to go up again. It went down a lot in the last months. Seems like a good opportunity.

That's the sets I would buy right now, and clearly not recent sets like OP14-15

Source : TCGIndex

Source : TCGIndex

Why is it the only TCG with prices going down that much ? Seems popular to me.
Source : https://tcgindex.io/