My girl was looking for a dress for Halloween. Yesterday she found one on Amazon for € 35 and put it in the cart, but did not buy it. Today she looked it up again and it was € 50 so she asked me to look it up with my phone with my Amazon account - it turned out to be € 23 for me, less than half of what it’s for her!
Clear her browsing data and try again, this happens with flights too.
This is why fingerprinting is an issue.
Sidenote. I went to by a boxset of books for my partner and it was ~50 for the set, I got back to pay the next day and it is 100. On ye third day it is ~70 with a note that it is down from 110. Scumbaggery.
Camelcamelcamel is also good for seeing pricing shenanigans like this too. A box set a relative asked for was marked as $100 but on sale for $30 and checking camelcamelcamel I could see it’s rarely listed at its list price and basically always marked down to $25-35 with spurts of time at $40-50
Use Firefox and max out all of its security settings. When you do this, the fingerprint protection is so good that not even Google can ID my PC anymore. I have to pull out my phone and confirm it’s me every time I log in.