Wandered over here after 240ztt from another forum.... I don't know about in the U.S., where people don't typically know their value, but in Japan, the caps tend to disappear rather quickly. I won't park my car outside my garage and walk away without taking them off. Now I don't even bother putting them on unless I plan on going to a car event where I stay with the car. Replacements run between 5k and 8k Yen apiece....if you can find them. I have one that's silver vs the rest that are black....I'll probably just have it repainted.... If anyone knows of a good foundry, I'd like to have them cast in aluminum and keep the plastic ones as backups.... 240ztt, send me a pic of those rims you're looking for so I know what I'm aiming to.