If you want real accuracy, buy a Fluke 87 or a Simpson. That's not necessary for most applications, though. Measuring the resistance of a rebuildable atomizer coil can be accomplished using a cheap digital meter. What most expensive meters lend to the application is auto-zero and auto ranging.
Without auto functions, you have to clean the contacts frequently to minimize contact resistance and measure lead resistance before measuring the wire. I short the meter leads and rotate the plugs until the reading stabilizes, then subtract that number from the readings I get on the coil. If you do that, you can rely on what the meter reads.
Lots of people are using a Harbor Freight meter that is always on sale for $3.99. It's accurate enough for ecig work. Really, the things most people measure are house voltage, car battery voltage, and kid's toy batteries. Most of the time the ohmmeter function is just used for continuity in the average household.