敝帚自珍

bìzhǒu-zìzhēn

[everyone values things of his own; value the broomstick simply because it is one's own] 将破旧的扫帚视作宝物来珍惜, 比喻自己的东西虽然并不好或不贵重, 但自己爱惜。 也作"敝帚千金"