I got one tonight as well with a stupid comment that an item I'm selling is available in any dollar store for a fraction of what I have been selling them for (successfully) for three months.
I debated responding but decided, in the end, to just report the jerk to eBay for misuse of the EFS.
I'd rather see him get a warning from eBay about his stupidity than engage him in a non-productive exchange of emails. It never pays to enter a battle of wits with an unarmed person.
Cheers!
Bill
Bill
