'Technically' you ought to show things here, so if you post a kind of copy of your ebay ad here, you might mention that there are more photos/information/higher pricing on an advert on eBay, just in case it sells there....folks sometimes put in that something is also for sale on XYZ....so I can't see it being an issue.
Just don't advertise here to drag folks elsewhere, iimmc ?
I genuinely don't see it being a problem for you
Be wary of this as their relatively recent change in terms and conditions means items withdrawn from sale can still result in you being charged for using eBay's services (i.e. their advertising) so you may end up with a bill for their cut. It sounds ridiculous, but they are doing this.