I don’t have any actual experience with the eBay pumps, but I was originally planning on getting one when I started my infusion setup. I eventually decided that I was better off paying for quality, and forked out $300 for a ‘good’ one from a composites store (won’t name them).
When it arrived I have to say I was disappointed, it isn’t exactly of the quality I was expecting. Not to say that it’s bad or there is anything wrong with it, in fact it works solidly and has performed flawlessly as of yet. But when you fork out 300 bucks for a pump that you expect to be higher quality and made in Australia; and then receive one with an unreadable Japlish manual and no noticeable difference between the eBay ones… It does make me wonder whether there is actually any difference at all.