Nice score.
If you don't want to brake the bank my best advice is this:
1. Get out there, head to swap meets early, try to find old blokes with lots of 'junk' in there shed. And look hard!
2. If you can't do that only collect the later stuff, around the metric change over, before this prices go through the roof.
3.Don't buy Golden Fleece, there Victa 18 can usually sells for around $2000 in a good condition
4.Stick to the mower cans! Don't get carried away and start collecting oil bottles and grease cans.
can collecting is even more expensive then Victa collecting...