Honestly, I think your paying more for the chance of trying multiple flavors than price per ml.. Many suppliers won't/ or have stopped even messing with the samples because they are a pain to make and deal with....
Johnson creeks starter kit is really nice for a newbie, lotta extra goodies... Some don't care for their juices other's love them..Shipping time can be fast or slow... If the sample pack carries 3 of their top flavors ( peach cobbler, Tenn cured, vanilla Ice cream)..Might be worth it..
Eastmall sells 5, 20 ml bottles for 50$ Thats 100 ml of
juice ( large selection of flavors)...And they are having a sale till the end of may ( go to the eastmall forum in the suppliers list to check it out) worth it...Otherwise their S&H is around 15$ for a small order ( you could pick up some extra atomizers/batteries etc.. too)
The smokeless shop...Carries Janes kick juice in 4ml sample bottles for 4$ each in all flavors....( also a large selection)
I've also heard Midwest vapor is now selling 4 ml samples as well...