I am sorry for the messy eBay error situation but it’s too easy to just blame GarageSale.
For those who get the same error:
“The item cannot be listed or modified” is eBay’s infamous error #240.
Error #240 is returned and generated by the eBay server (not by GaragSale).
Often this error is returned by eBay when you’re using any word or code that eBay does not allow.
We created a special help page that list all facts we know about this error:
You’ll see that it can have numerous reasons.
Thanks to the vague error description this error is really misleading and often it’s very hard to figure out what is causing it.
Also note that eBay makes use of content filters to make sure you don’t use prohibited terms or code if you use a third party listing tool like GarageSale. eBay doesn’t seem to use such restrictive filters if you list through their website. That’s why you sometimes don’t get this error there.
You can always export and post one of your affected listings here so we or other users can help figuring out what is causing that eBay error.