There's no reason to use third party sites like eBay or amazon for anything vape related. Too many known, trusted vape gear vendors with competitive prices.
As to your problem, do you have a multimeter or a variable power mod?
There are things I'll cheap out on and things I won't...items that can affect my safety, like batteries, chargers, and meters fall into the latter category.All I have is this ohm reader. The reason I got it was because it was pretty cheap. Could you possibly link me to a vape store that has an ohm reader for quite cheap.
Thanks,
Ryan
These are the expensive ones I mentioned earlier as being my next likely purchase, even though less than $30 for one of their base models still isn't exactly a bank-breaker...http://www.shop.usaohmmeters.com/Home_c1.htm?page=all
These are the best. I just bought one, because my original one was so inaccurate as to be dangerous!