Like everything in sales..depends on location, the crowd, time of year, etc etc...
I have sold lots of the perfume pens over the years, but we get a lot of tourists around here...so lots of people will buy them because they are allowed on airplane flights...
Also, I go for the profit made in quantity sales...ie, i lowered my price to $20 each (the cost of the kits are really fairly low, especially when purchased in quantity from one of our good vendors here)...
And I do think your blanks are totally awesome and would love to have a few to try the market with, but your bottom line (while fully understandable) leaves a question in this economy.
I saw the perf pens you made (incredibly beautiful in my opinion...really eye catching)...
if you don't mind my asking, have you sold the one's you made...and how much do you sell them for..??