About 2 years ago I invested in a Lee filter system - great system although I don't use it much, when I do I love the chance to use both grads and ND filters to slow down the shutter speed.
Recently I have changed a couple of lenses and I have been looking at purchasing another Lee adaptor to mount the Lee filter holder on to the lens. I have also been looking around to find a cheap way of experimenting with rear ND filters for a lens I have that requires that filter type.
Although I have always appreciated the quality of Lee engineering, in the end it is really only a step up / step down ring and I have trouble paying $109 in Australia for a piece of aluminum.
I am sure every body would have heard of the biggest online shopping store in the world - Alibaba, but did you realise they actually deliver to Australia free of charge.
For those interested here is the address http://www.aliexpress.com/all-wholesale-products.html
I picked up 3 adaptor rings for $37 delivered to Singapore (same price delivered to Australia), a ND 16 (4 stop) 100 x 100 filter for $18 delivered and finally a set of step up / step down rings (more than 10 rings in the set) for $13. Now this may all be crud, but I have bought gear made in China before and in the end I have been happy with it. In reality probably 80% of the consumer goods in the world are made in one part or another of Asia. Anyway thought it was worth the risk of spending $67 and hopefully saving myself over $500 if I had bought similar goods form a brand name in Australia.
Even if i have to replace it every year for the next five years I will still be ahead.