I have been recently reorganizing my world coin collection. In the past, I often would just take any coin to fill in a country. It could be a common coin worth .25 cents and in fine condition. But now I am removing any coins from my collection I consider uncollectable. I am not even going to try to swap them; I plan on just giving them away to a local school or library. The rest of the coins I am removing from my collection, which are still collectable, I am putting on my swap list. This should take about a week. I want nice coins, at least half being silver, to be in my world coin collection.
I recently added a silver 1945L 1/2 Rupee for British India, a silver 1952 50 Piastres for Lebanon, and a 1930 5 Drachmai for Greece, and a 1 piastre emergency WWII coin for Syria. All vf or better. So my goal is get as many countries as I can, but with quality coins that worth at a couple of dollars or more. No cheap fillers.
This could take some time, perhaps years. But it will give something to work toward.