GPS jammers are less than $30 on Alibaba, truck drivers have been using them for over 10 years [1] to defeat their bosses tracking devices.

Multi-Band Jammers are $1000, burglary rings are using those to block all Wi-Fi, cell, GPS signals - check out this arrest report from last week in Pennsylvania [2]. If I was a high-end car thief, like in Gone in 60 Seconds, that's what I would use.

[1] https://www.theregister.com/2013/08/12/feds_arrest_rogue_tru...

[2] https://dauphin.crimewatchpa.com/lowerpaxtonpd/3730/cases/or...

That's a professional car thief starter pack right there. I wonder what the Windex and shaving cream are for.

It doesn't take much to jam GPS, I'd imagine a small handheld device could easily do it. The GPS signal is already below the noise floor.

I think you missed the point. The Faraday cage is built inside the truck's cargo, and I put the car inside the Faraday cage directly. I also dismantle the car while the truck is moving so when I reach the chop-shop the GPS and all the car's guts are ready for sale.