$600 is the reason why the RMA process is a nightmare ;)

I checked the prices for 64GB DDR5. There's some variance based on brand/model but the average and trend seems more or less right. Did you happen to notice that it is about prices in the EU?

They seem pretty similar to the values from pcpartpicker. (https://pcpartpicker.com/trends/price/memory/)

Probably not tracking eBay but retail stores..

While the .eu should make that more obvious, the text is pretty small/low contrast. Also specifically indicates it's the Dutch market.

https://pcpartpicker.com/trends/price/memory/ may be more interesting to US users.

This fails a basic smell test: For DDR5, there is only a ~6% price difference between 16 and 32GB. Reality is that 2x16GB goes for about 400 (so that checks out), but 16GB of DDR5 can be had for a bit more than half that (250ish)-- obviously, otherwise people would just buy a 32GB dual channel kit and sell both 16GB sticks at a huge markup.

Pcpartpicker has no plot for the 16GB DDR5 category (2x8GB?), which is the one value that makes absolutely no sense in the ramtrack plots.

But if you look at individual DDR-2x8GB items on pcpartpicker, it becomes obvious that ramtrack is just completely off here (why would 16GB be only 6% cheaper than 32GB, that is just not credible).