There is a fair bit of fluctuation, but evidence suggests that prices have simply been on the rise in general, not specific to holiday pricing.
https://pcpartpicker.com/product/9NPzK8/gskill-memory-f42800c15s8gvrb?history_days=730
https://pcpartpicker.com/product/L2VBD3/gskill-memory-f43200c16d16gtz?history_days=730
https://pcpartpicker.com/product/p6RFf7/corsair-memory-cmk16gx4m2b3200c16?history_days=730
Trending charts are pretty much identical for all brands/quantities.
FWIW, I'd consider now to be a terrible time to buy RAM, and would only do so if I absolutely had to build a new system, paying 50-100% over a year ago is hot garbage. Compound that with vid card prices, and it's kind of a not-great-time to build a new system.
Give it another 6mo imo, see how things look at that point, or wait for the glut of mining cards to hit ebay first at least.