Not sure if this is a good fit for this category, but mr moderators can move it around if needed.
I have been trying to collect all the original 500 colors in soft plastic. Through some good luck and some spending too much $, I have at least decent examples of all, including dark gray and brown, except yellow! All the yellows I see (and own) seem to be late 60s or 70s. Are soft plastic yellow 500s actually rare? Maybe if one shows up on eBay and sells for $1k maybe they will appear in great quantities, but what am I missing? Did the early yellows all get refurbed? Am I just looking in all the wrong places? Lastly, anyone have a spare they would like to sell?