Good point, rarity never goes out of style. I will let you come up with vintage examples, here are some early modern examples.
1982 1oz gold panda NGC MS69, $11000 today vs $7500 last year, +47%
1983 1/20oz gold panda NGC MS69, $1000 today vs $600 last year, +66%
1984 8g gold rat NGC PF69, $26000 today vs $12000 last year, +117%
1985 27g silver panda NGC PF69, $2500 today vs $1800 last year, +39%