Back in '12, I found an auction site that had almost no traffic. Over a period of a month, I accumulated ten 5 packs of PAM64 Exclusivos for between $25 - $29 ea. I also picked up a box of Flor de las Antillas Robs for $54 and a box of Hemmingway Maduros for $100. Oh, and 4 boxes of Undercrown Toros for under $80 each.
About 2 years ago, another site was experiencing light traffic. Picked up LX2 Toros for $1.10, Fuente samplers for under $1.50 per cigar, assorted 601s for as little as $1.20, assorted Crowned Heads for $2, boxes of MF 1922 Torps for $130, etc., etc. Though my best score there was the 7 Perdamo samplers I picked up for $5 ea. Each sampler included 4 of Nicks higher end sticks and a $50 Bugatti lighter.
Opps, almost forgot about the $1.50 La Palina Classics and $1.90 La Palina Blacks & Reds I picked up a couple months ago.
There are probably even better ones then those, but I can't remember them all.
David