In the 70s lived in a big old house and started going to local auctions and buying lower end antiques. When I went to sell the house and buy a new build, I noticed an ad in the paper from an American who was in the country simply to buy antiques. Phoned him up, added one third to the price I paid at auction, and when he came he didn't quibble about anything and paid in cash the prices I asked. From then on, I began to collect items just to sell to him when he came over once a year. Much to my regret, this stopped when I moved to the north east.
These days, I still go to the auctions especially when the weather forecast is very bad and the turnout small. That's when I seem to pick up the bargains.