Eh, you can get a tracfone on Amazon that includes an free plan as promotion. Anywhere from $20 to $80.
I think there's like a Samsung Galaxy A15 or a Moto G 5G 2024 for less than $80 that you can get with a promotion, you just go to the website, type in imei (the SIM should already inside the phone and its tied to the imei), activate, wait 60 days and it should auto unlock.
You might have to be inside the US for the activation and perhaps for the auto-unlock too.
You don't need a 60 day plan, just 30 days (which if you have a promotion, they include a free 30 day plan), then let it expire and wait another 30 days.