I bought a 510 kit from China I don't remember the name of the place, but they had free shipping. It ran about $35 and I bought 50 ml of menthol and 50 ml of apple from light in the box. That was like $17 delivered.
That was my first order, however I read that it would take forever to get my stuff so I ordered another 510 kit this time from cignot I bought the PCC and extra juice. Total cost about $80.
I was looking at what I was paying for smokes and it didn't make sense to wait for the one from China once I crunched the numbers. Plus I knew from reading everything in site that I would need backups and more battery power.
I got my second order well before my first and the liquid from LITB showed up a week before the 510 kit from China.
So really my first settup was 4 batteries, 4 atties, 20 carts a PCC and and about 150ML of liquid, for right at 130 dollars.
It worked really well for me, I smoked a pack and a half a day for 25 years. I have not had a cig since the day my first kit showed up.