My favorite samples places
Velvet Vapors (I highly recommend Raspberry Gingerale, and I have heard good about Black Cherry & Velvet Vanilla)
Juicy Vapor (so many choices - mostly sweet, and many many configurations of sample packs)
PureVapes - 0mg samples only but very tasty. Raspberry Custard was one of my faves.
And if your nicotine is anywhere near 24mg, FreedomSmokeUSA though they only have samples for some of their huge variety of juices. I like their oRYental 4 (very sweet caramelly tobacco), Hopscotch (50/50 only tastes like honey and butterscotch to me), Voodoo (50/50 only, something fruity, something dark, and maybe cinnamon?). I use mainly cartomizers now and I will not put 50/50 in them (I only use 20% or less VG in cartos to keep them flowing/dragging well longer), but I have manual batteries so I drip the thicker juices on an atomizer sometimes
If you order $10 or more stuff at DIYFlavorShack, then you can add some of these $1 samples to your order (no more than 1 of each). I heard their Raspberry was good so I bought their Raspberry flavoring plus their Raspberry Vanilla and their Raspberry Bubblegum juices to try. BTW - they have a Raspberry Thin Mint juice too. Their juice prices are high but I wanted a couple of the samples so I had to spend $10.
http://www.diyflavorshack.com/ProductDetails.asp?ProductCode=Value+Menu+Samplers
And I highly recommend you sign up at Gourmet Vapor so you will get their sale notices. When they have a sale, it is often a very good sale.