I've made a little graphic to place at the bottom of my auction descriptions, anyone is welcome to use it if they like.
I wrapped the button in some basic html code to add my buddy link, obviously insert your own buddy link code to replace mine (maybe just need to edit the buddy number at the end of the link).
Code:
<div style="text-align: center; border: none;"><a href="https://www.ebid.net/uk/buddy/420706" target="_blank"><img alt="Click here to join!" src="https://i.postimg.cc/bJqNmnPD/ebid-logo-vector-orange-join.png" /></a></div>
The button image is hosted on postimage, you can use this or you can take a copy and host it whereever you like. Comments welcome, I might even do requests.