Yes. eSIMAdvice currently lists 33 AlpineSIM El Salvador plans.
The lowest displayed AlpineSIM El Salvador plan is El Salvador · 100 MB · 7 days · 4G, at $0.75.
El Salvador · 1 GB · 7 days · 4G is the current best-value match by displayed price per GB: $2.47/GB ($2.47 in total).
Yes. Eligible displayed prices already include the active AFFINCO coupon where the provider rule applies.