How do you all find good deals?

When I check Key Collector for some random issue, it'll say the mid price is say $2, high is $8, and then I look on ebay and everything is $15 plus shipping. When I look at Marketplace, people selling keys in my area are two to three times the price on ebay and people selling beat up bulk bronze age fodder are asking $2+ per issue. Where are people finding actually good deals?