I would say that is WORSE than rubbish, it is actually deceptive and deprives the buyer of a key part of the buying information they use to inform a purchase. I'm a musician and if I want to buy a guitar from eBay, I want to read about the guitar from a practical perspective, not a marketing perpective. I want to know details about the history and condition, I want to know how long the seller has had it, and I want to make judgements abbout the honesty and standard of knowledge of the seller from how they write and what information they offer - the AI hides this behind a layer of BS.

For instance, there is currently a bass guitar for sale for well below market value and the "full description" says:

"This Fender Jazz Bass Guitar is a must-have for any serious musician. With its sleek design and powerful sound, it is sure to impress on stage or in the studio. Crafted in the USA, this bass guitar is made with the highest quality materials and built to last. The brand's reputation speaks for itself and this instrument is no exception.  Ideal for those who want to take their bass playing to the next level, this Fender Jazz Bass Guitar is perfect for professionals and beginners alike. Whether you're looking for a new addition to your collection or just starting out, this bass guitar is sure to exceed your expectations.|"

There is nothing here to explain why the selling price is low, what age the instrument is etc. My assumption is that the seller is hiding something and that the guitar is a fake/clone/replic and the AI hides the human element that might allow me to make a judgement.

AI would be helpful if directed at the seller, asking them to complete commonly asked questions and filling in gaps in their description to give buyers accurate information and allow them buy with confidence. I will not buy anything on eBay that has an AI description - it is dishonest, unhelpful and a scammers dream.