Dent in driver head | Golf Monthly

Browsing through eBay on my lunch and I've come across a Benross HTX driver in 12degrees with a stiff shaft selling for £25!

This isn't a standard spec, as on the Benross site the 12 degree is only available in regular shaft. This is also the case through AG, although they recommended 12 stiff during a fitting with a 10.5 version of the same club. I almost hit the buy button, until I saw the clubhead has a dent in it.

It looks fairly sizeable; my question then is IYO would the dent alter the playing characteristics of the club, and would the club therefore be considered non-conforming for competition play?

I suppose in a worst case, I could buy this and see how it goes then pick up a new HTX and look at swapping the shaft?