When we made our monthly trip to Lidl today, they had these. Faux leather personal-sized ring organisers for €4/$4.
Considering the price, they felt really nice. They would not last a lifetime, naturally but they come boxed, with plastic dividers, a ruler, inserts plus a 2021/2022 calendar and a notepad at the back. There were brown and black in stock, but I also found a box for a gorgeous saffiano-like version. The actual binder was gone and the empty box was the only one.
If anyone is looking for a cheap binder as a first binder or a test binder (will this size suit me?) or for another purpose (travel, health kick, recipes), you couldn’t go wrong with this. If you have a Lidl nearby it may be worth your while to pop in and see if they have them.