For a while my strategy on eBay has been to bid on lots and then sell off redundant pieces, thinking that the per-item price will be lower and then I can part it out at a slightly higher price. Especially with lower overall shipping.
In practice, this doesn't seem to be the case. I've seen some lots of, say,
FR stuff goe for an average of $5-7/item + shipping when often these same things go for much cheaper individually (White Wolf clanbooks are another classic example -- often they are $3/each individually from people selling collections willing to combine shipping, but a lot of 15 will go for $60 or more).
Any insight into this?