Ive been reading up as always and with my huge 9months experience

Q's
There is a home brew "shop" on ebay that I can get 4 ball lock kegs with 2 re-seal kits for $230 delivered. That's at least $100 cheaper than I can get at a HB shop anywhere. I have asked if they are pressure tested but havn't heard back yet. It sounds too good to be true so are there any catches I should know about when buying cornie kegs, especially off ebay. It is in Melbourne so not to far away which is a bit better. The same shop has full gas bottles, 6kg for $218 delivered (I assume it is 6.8kg), 2.6kg for $165 and 1.8kg for $135. Also sounds too good.
Looking at gas regulators, they range from $50-$90+ for dual guage. None have screw driver bits for adjusting pressure so apart from a bit of bling and other bits is there any difference in quality? I would rather sve $50.
I got into home brew because I could make cheaper beer than I could buy.....




Cheers.