My vape career, in rough order (since I quit smoking anyway, tried eGo pens and they were naff):
Totally Wicked Odyssey: £40 (before I knew any better)
Nautilus Mini: £25
iStick 20W + GS Air: Free (started working at a vape shop)
Wismec Presa + Lemo 2: ~£60
Veritas clone: ~£7
Liquids up until I started mixing: ~£100 (started mixing early on!)
Getting started mixing: £50 + ~£30-40 every 6-8 weeks
Hotcig DX200: ~£80
Aromamizer: ~£35
Aeronaut RDA: £45
Atmizoo Dingo (+extra tubes, spares, rhodium plating, upgraded switch): <£100
Goblin Mini: £25
RX200: £40
Noisy Cricket + Indestructibe: £40
Various clones (Fountain V2, Diablo, Kayfun Mini V3, various others I forget): ~£40
Wismec Skyladon + Bambino: £30
Aromamizer Supreme: £40
iStick Pico + Wismec Theorem: Free (branching out into vape shop accounting)
iStick Basic: Free (selling like hotcakes at work, helps to own one)
Stingray X Copper clone: £15 (just about to go collect from the PO!)
Batteries up until now: ~£100 (got enough to last an age)
Including various spares, I've probably spent close to £1150 in the last 12 months. Whereas a 25g of baccy every 4-5 days would've run me just over half that. That said though, I'm very happy with the setups I've got, and maintenance is cheap as anything now. I feel better, I smell better, and I wouldn't have got the weekend job I have if I didn't vape, which more than covers it. Vaping has definitely been a net positive in my life. Plus it's fun!