Well, to tie off this story - I got shafted on the kegs.
I rung the guy, told him I'd buy them and agreed I would pick them up on the weekend, got his details etc. All sorted. Weekend was first opportunity I would have due to work commitments. No worries.
Next day he rings me up and tells me he's had heaps of calls with people offering him $50 for the kegs and would I buy them for $50. I said that I thought we had made a deal and it wasn't good business to then ask for more money. The conversation lasted for a few minutes with him becoming quite pushy. Cut a long story short, against all my moral and better judgement I said I'd take them for $40 - he gets a bit more and in fairness to our previous deal, he drops to $40. Still a good price for two kegs which is why I didn't just tell him to shove it for backing out on the agreed deal/price. He agrees and we hang up.
This morning he texts me and tells me he is sorry but he sold them to someone else for $70......
Yeah 'sorry' my a*se. Looks like I'll be hunting for my pot for a bit longer yet!