Air Sampler Suggestion

I’m close to purchasing an IAQ pump. I’m trying to decide between the Buck Bio-aire, the Zefon Bio-pump Plus, or the Gil-aire 5. Do you have any sugesstions/pros or cons? Also where is the best place to purchase?

I just purchased the Zefon Bio-pump and starter kit from Pro-Lab.
They were extremely helpful in determining what I needed and explained in detail how to set it up and operate it. Plus all there samples are free when they do the testing.

I got one from here

I use pro lab for all my testing

I’ve got a couple of these. I got a deal on a set of 2.