The eBay app is a bit rubbish to say the least, so if you're constantly experiencing problems with listing via the app then I'd suggest listing your items using a computer or a laptop. Take the shots that you're including in the listing with a decent digital camera, then once you're done remove the SDHC card from the camera and place it into the card reader slot on your computer or laptop. Save the images onto the desktop, then upload them to the listing. You don't necessarily need the kind of camera that a press photographer would use in order to get top quality photos - a small, hand held digital camera would be sufficient for the job.
Although I haven't sold anything on eBay for a long time now, on the rare occasions when I do bother to list something I always take the shots with a Canon PowerShot A2100 IS that I've had for donkey's years, and I always manage to get excellent shots of the items I'm taking photos of. Therefore, if you don't have a decent digital camera available try and pick one up on eBay - they can be had for relatively little money and will provide years of good service if you choose a camera that has been well looked after prior to being offered for sale.
