Why do you even care what this woman sells her Si for?
In my mind, it's either because:
a) you want it and the price is out of reason/budget, or
b) you're crusading to keep ped prices down in general.
Reposting this on MA and exclaiming that the price is ridiculous is one thing. Sure, $2500 is not a realistic price point for sale for that bike.
Sliding into her DM's to "educate" her is another. Actually, your reply is pretty archetypal man-splaining and discards helpfulness the minute you say: "The moped forums are laughing at you."