I collect period Star Wars stuff due to the nostalgia of it all. I was in-utero to 6 when the first movies were released but my brother was fully initiated and immersed in Starwars. He had alot of that stuff from Xwing and tie fighter to the the Falcon, land speeder, Boba Fetts ship and many of the figurines. I on the other hand was busy throwing his figurines out the van window because I wanted to see if they could fly (yanno typical obnoxious 2-5yo little brother stuff). In my defense, my older brother threw his MF out the 2nd store window for the same reason aound 1979-80 if stories are accurate.
Anyhow, all those memories (vacations, his birthdays, holidays etc.) attached to those toys drives my modest vintage SW collection. If those cards were mine, I'd frame them (like in a collective frame or two) as a sort of 20th century popular art. That would be so cool. My brother's cards were at my grandpas who passed on in 2018. IIRC he picked them up before the estate sale and as such are squirreled away somewhere on his farm.
Anyhow, while I did get a few ROTJ toys as a kid around 1983-84, I was big into He-Man & the Masters of the Universe, Voltron, Transformers and Mask.😀 You absolutely should hold onto those SW Cards. Even though the franchise storyline "ended" with Rise of Skywalker, there really is endless fodder in SW Cannon for other movies and series like Mandalorian for example to fuel future interest and those cards are emblamatic of a bygone era in kiddom and as such IMO will only increase in monetary value although the sentimental value is where it's at for me.