SHQ have 2 or 3 second hand swap meets a year, the 1st one is usually in september and you will need to get there early to have a chance at the good gear
I've had good experiences with both ebay & especially seabreeze! Shops can be a bit pricey with 2nd-hand gear, but SHQ have swap-meets each year & you can get a good bargain there! not sure when the next one is?
WA seems to be the state for bargains though...put the word out what you're after & somebody might PM you!
[edit] Haha, Jman, ya beat me to the punch with SHQ's swap meet comment! I need to type faster next time.
i got all my stuff second hand except for a sail direct from Andy Mc @ KA : from mates, ebay, SHQ (some of it at their jumble sale), RPS, the hard rubbish !! (i got a bombora big toy longboard :) and when i went home to blighty i brought a board back with me ! It was 8kg of my 22kg on Singapore with no extra charges.
I think all the second hand gear is in my garage !