Starting from September 2020, eBay provides a unique code called eVTN.

Item specifics are characteristics of a product such as brand, size, color, type, model, and so on. They are used to describe your items to buyers and help them find your products. 

eBay does not allow to change eBay item title/subtitle/duration/private listing flag if...

eBay is changing to a monthly billing cycle for fixed-price GTC listings as of the 1st of July 2019.

The problem occurs if eBay cannot fetch the image for one of the reasons.

It is possible to have different prices using the price change or price from custom attribute or...

eBay allows revising items QTY to 0 only if you use Out Of Stock feature.

Usually, Gallery image issues happen when eBay was not able to fetch the self-hosted image

eBay implemented some changes which affected updating of the Items which have Self-Hosted images.

M2e pro displays final fee as it is returned from eBay. There's no conversion performed.