Yes. eSIMAdvice currently lists 16 AeroCell Guernsey plans.
The lowest displayed AeroCell Guernsey plan is Regional · 41 countries · 500 MB · 1 day · 4G · Europe, at $2.39.
Regional · 41 countries · 50 GB · 180 days · 4G · Europe is the current best-value match by displayed price per GB: $1.67/GB ($83.59 in total).
Yes. Eligible displayed prices already include the active AFFINCO coupon where the provider rule applies.