Bernie, I am finding out the buyers are more likely to buy the higher value listing as it makes the shipping cost more worth it.
People think like this: hmm, $1.20 + $2 shipping, that's $3.20. Why don't I buy 10pcs for $9.90 + $2 for shipping, one unit will cost me only $1.29 ... Comparing to $3.20 it's a deal. However, they do not realize that while they manage to use 3 units, rest of them will be expired. Seller made almost 10x the profit, buyer slightly overpaid (was able to use 3 out of 10).
I am trying to make bigger lots between $5-$9 but some of my items are 100pcs/$1.20, it's a compromise, I am one of the best games on eBay for someone who needs 1pc and also someone who needs 1kpc.