I'm a buyer.

Forget compelling as such.

Think accurate, factual, detailed, set out so it can easily be read.

I quite like bullet points for some items.

You need compelling photos-clear and several of them.

You need measurements or sizes.

If your item is like several other items on ebay, then you need the point of difference-quality? brand?

You can set out sales terms in the ad but if they end up longer than the ad itself, it is a turn off. You really don't need to add much.

Mainly (as far as I am concerned) your ad has to come across as clear and detailed enough so I don't feel I have to ask you several questions, but that you probably would be helpful if buyers do need to see extra photos etc

Maybe have a look at other ads in the sort of categories you might sell in. See which ones appeal to you the most and try to  analyse why.

darn it!

I came to this thread thinking it was going to offer advice for writing selling descriptions.

Call me cynical but IMO, there's a good chance springy's information is being used for other purposes.

At least they used a capital H in their question.  But that was probably automatic.  They are gonna need a lot of help.  Better off going to ChatGPT.

"How to write compelling sales copy"

Instapage  FAQ

What is the AI - powered tool for creating eBay ads  copy with AI ?

Instapage's AI content generator is a tool that utilizes artificial intelligence to help users create compelling eBay ads copy with AI

I haven’t replied earlier and this is more of a faux-reply than a how-to reply.

If a seller hasn’t the know-how to write descriptions for the items he/she sells, hiring someone with that know-how seems the best course of action.

Using AI to generate such descriptions has severe limitations, and as it’s increasingly used by people who cannot or don’t want to put in the work themselves, these will - also increasingly - become a stew of bland and similar-sounding description-doodah.

Asking for this on a public board seems like going to a surgeon and requesting step-by-step instruction for self-surgery, or to Porsche and asking for a build-it-yourself kit with extra Porsche parts donated by the company.

 I don't believe for one minute, these questions are from  "real / genuine" users requiring  selling advice

Here's another one

https://community.ebay.com.au/t5/Buying/selling/m-p/2622950#M143850