Purchased:
Roughstack kit with bats, charger, atty, etc: $75
Build it yourself kit from madvapes: $8?
Used Buzz, and some parts: $75
Evercool box mod (2 14500's) from givesuhe11: $35
Evercool Tekk mod from givesuhe11: $125
In general, I think mods are like cars, everyone is going to have different tastes, and value features differently. Throwing $125 down for the evercool box mod was tough, but it had features I wanted - cell charger being the major one. It will likely be some time before I am in the market for another > $100 mod.