Username001 You usually cannot buy location data that isn't anonymized, Google doesn't sell data at all from what I understand, rather you give statistics you want your ads to show under and Google uses its Google powers (large data collection) to find people in those stats and show them said ads.
I don't think LE 'buys' data from Google, usually they just ask
"Big tech does have these doors and they are for sale.", why would 'big tech' put vulnerabilities in their devices and sell them, when their business model is collecting data you consented to have logged...As far as I am aware, almost every practice Google does with Google AdSense is in their privacy policy.