Hi guys, What do you think is the best price for the vampire 80. Here is the feature of the box mod. 1. Reverse Polarity Protection 2. Output Short Protection 3. Low Resistance Protection 4. Battery low voltage Protection 5. Temperature overheat protection 6. Variable wattage: 7-80w, variable voltage: 1.4-13v 7. Compatible resistance: 0.3-2ohm 8. Magnets battery cover 9. Adjustable 510 electrode 10. Dual 18650 batteries.