If you're patient, you can sometimes get some decent deals on Ebay. Get yourself an auction sniper tool for your phone or computer and look for lynotype or monotype lead. You can also get "bhn tested" lead on ebay, but you never really know whats in it till you start casting.
An auction snipping tool is a program that wil place a bid for you automatically, with only seconds left in the auction. you basically enter your action amount, set it and forget it.
My only comment though, is don't go overboard. You are expected to pay for anything you win. There have been times when I've bid on 3 or 4 different auctions, not expecting to win the item, based on past winning amounts, and have won all of them. There are sites that will let you set up bidding groups where you enter your bid amounts for individual auctions in the group, but set the rule to only win any number you set of an item. When/If that number is reached, the sniping software no longer places bids.