H rustyIt2,
Did you switch the box to HTML mode to copy/add the hyperlink code?
The correct code should be something like (no finesse):
<a href="http://stores.ebay.co.uk/OLD-CAR-MAGAZINES-and-BROCHURES">Visit my eBay Store</a>
The anchor tags <a> </a> surround the element/text displayed and the href in the tag is the actual URL link.
Danno