leaderfins001200020
20% off all LeaderFins products on their webpage. Their prices are comparable to stuff found at dive shops, but for niche areas like underwater sports this is the best deal around. Shipping for two pairs of fins cost me $75 AUD so it is better to buy a lot of stuff in one go.
The discount code came to me as a Facebook offer that was supposed to expire, but it never expired and was able to be used by other people afterwards too.
The frameless masks look good at AU$18.63, although shipping is $22.10. But I use a Beaver as my primary mask and I have a bunch of (more expensive) spares.
I don't dive enough any more :(