For the price of 5 or 6 bottles of vendor juice (about $30 each), you can get a liter of 100mg nic, a quart bottle each of PG and VG, some flavors, and either a set of scales or some syringes and beakers to mix with. Over time you'll make money over buying vendor juice and you mixes will equal or surpass the juice you buy from a vape shop. You get to play with flavor percentages and tailor the juice mix to suit your own taste.