Is this one of the early A500s with the grean floppy leds as well? I always liked that model better so I'd would advertise it for sure with those 'features" as you may get more money. I have no idea how much though.
AFAIK, red-green led combo was on dual-membrane Mitsumi keyboard, and those shipped with Rev3&5. I might also be wrong since Comodorre's stock management is almost legendary. Dual-membrane keyboard matrix is very hard to find nowadays, so this would be more like disadvantage IMHO.