The only comment I will make is:
The request to send pictures is a PITA for some of us. I have use a camera, take several pic's as I'm not a photographer, then download the pic's, review them, pic out the best and or edit them, then do an email and attach the pic's. Translation: A time consuming royal PITA for a 20.00 purchase.
On the other hand I also understand 440's side and reasons for the request. but for a 20.00 purchase ?
I don't think it was worth either party's time.

Seller, refund the $$ or send another part.
Buyer, accept the refund and go elsewhere or take a partial refund. If you in fact gave them 24 hours or less to respond, sham eon you