rtvapes (USA) sells a litre of 100 mg liquid for 50 bucks... they ripped you off. Four times the price.
Victor, you neglected to mention that you are comparing a sales price from RTS Vapes. Their regular price for that item is $99. You also neglected to mention that to compare 100 mg to 48 mg, you cannot simply divide the price of the 100 mg in half ... you need to add the cost of a litre of 0 Nic. And you neglected to mention the cost of shipping from the US. The last order I placed to the US cost $34 to ship. That cost will vary by the distance between buyer and seller.
Perhaps you meant to say something like: "RTS Vapes is having a half price sale on 100 mg nic. Add $x for shipping, and if you don't mind risking it being seized by Canada Customs, you can save some money"?
In my case, I buy 1 litre of 48 and 2 litres of 0 at a time. I vape 18 mg and make my own Nets, which uses the extra 0 nic. Each order, I'll add a glass bottle, or something similar, and qualify for free shipping, and have no worry of seizure. 30 ml of unflavoured ... ie, without the NET, costs me 1.59, and lasts me a week. I do not consider saving 10 cents a day, or whatever the end result would be, worth the hassle. When I add together the cost of the base, the cost of the NET (using Canadian cigarette price), and the cost of cartos, I come in under $5 per week, all Canadian.