For those of you who might be willing to experiment with a soldering iron, this is one deal that is real hard to beat. I bought about 20 of them.
A first rate, damn near bullet proof billet aluminum enclosure with a high quality 510 connector, and the Lipo to go with it - $10 (everything you need except the DNA board)
Just add a DNA75/200/250 and you have a VERY solid mod.
I found DNA75 boards on sale once for $12 ea, built a bunch of $22 mods that would cost $100 at the local vape shop.
HANA MODZ DNA 250 200 75 Do It Yourself ( DIY ) Mod kit Billet 11 colors | eBay
Evolv DNA 75 (retail box)
For $42 you can build one of these, solid as a rock: