No worries, it's totally worth the effort once every 3 months or so. I'm heading up again with a mate at the beginning of December to get my beef for Christmas - I fancy a dirty great Argentinian rib eye joint
For reference the prices obviously fluctuate a bit but the last Aus brisket I got from there which was around 5.5kg was £36. It's silly cheap. Make sure you shop around for other non-bbq type stuff though as prices do vary from one stall to another, as does quality.