The only thing that tempers severe disappointment is the arrival of another coin. And so my Quintillus coin finally arrived. I paid a total of $18 for it and I am very happy with the coin and the price.

This scanner photo hardly does the coin justice. It looks even better than expected in hand. Usually, it's the opposite with another seller's photo. I have complained about that fact more than a few times. lol
This is the seller's photo that looks closer but still not as good in hand.

Quintillus AE Antoninianus. Mediolanum mint. IMP QVINTILLVS AVG, radiate, draped & cuirassed bust right, seen from behind / FIDES MILIT, Fides standing facing, head left, holding standard in either hand; S. RIC 52, Cohen 25.
2.6g, 18.79mm