Recently, I purchased a lot from member Psyco489, who lives in Italy. His lot was advertised as a pair of Libya express stamps (Scott # E5 and E6).
When the lot arrived, it included only one of the Libyan stamps; the other was of the same design, but from Eritrea.
I contacted this seller to ask if he had the missing item, and to inquire about returning the Eritrea stamp.
Psyco489 responded right away and apologized profusely for the mix-up. He said he was sending the correct Libyan stamp immediately at his expense, and told me to keep the Eritrean stamp as his gift.
Now this is what I call great personal service. This is a sincere seller who is making good on a mistake, no ifs, ands or buts. I confess I should shoulder some blame because I failed to look closely enough at the photo, which showed the Libyan/Eritrean pair, before bidding. But I salute Psyco for the way he's handled this.