Littlewoods Poker have a Gtd tourney every night in their "Challenge" series. The larger ones never make their guarantee, and with good structure (although no antes), deep stacks, and slowish blinds, there is huge value to be had with a significant overlay.
Tonight"s game is $25k Gtd for $55. Starting stack is 3000, with 15 minute clock. It needs to attract 500 runners to cover the guarantee - tonight it just started with 340..... and that gives overlay value of $8000
Saturday"s challenge game is $50 Gtd for $75 buy in, with 5000 stack and 20 min blinds!