GitHub - i12bp8/TagTinker: Flipper Zero app for ESL research using IR. All based on https://www.furrtek.org/?a=esl
github.com
Flipper Zero app for ESL research using IR. All based on https://www.furrtek.org/?a=esl - i12bp8/TagTinker

Just change the price to whatever you want using a flipper zero and the linked app.

It’s a bit half-baked though because it wouldn’t change the db figures… so I guess it would have to be coupled with some social engineering.