I fail to see why it matters how many units people bid on. Just bid on the number of units you want and outbid them. Unless, of course, they're bidding higher than you're willing to go, in which case, welcome to the auction. I've seen some stuff on here lately that been bid-up to stupid prices.
However, you can still get good stuff if you're patient. I've been watching some of the Tat Caballero bids this week, and 5 packs are hovering around $26(ish). Sometimes over $30. That's high to me. I bid on a couple at $15, and lost, lost, lost.
Bids on singles have been going about the same, saw some for $6 per cigar. I bid on an entire lot of 10 singles at $3 each, hoping to win a couple, no skin lost if I don't. I won 9 at $3 each, which was my max for a 5ver. If someone else wanted one for $4, they could have bought it.
Maybe I shouldn't say this, but I really didn't want 9 of them. I don't have anywhere to put them. But, it's a nice problem to have.
I give bidding advice for a nickel per question. Can't beat that. You owe me a nickel.