Kris, there are many incubators available from $100 to $500 and probably more. Depends on your budget and the number of eggs you plan to hatch in a given hatch.
I've seen a several people using the new Nurture right from Tractor Supply, 25 eggs/$140
The GQF Genesis unit is over a hundred now and it can hold up to 42 eggs with a standard turner.
It appears that the Brinsea folks Really like their 30 and 50 egg units, but those are Not cheap.
You don't see the old Roll-X advertised much any more. They used to be considered the cadillac I think their price is around $500 for around 80 eggs?
Many use two incubators, one for the 19 day incubation and another for the last three days thru hatch. That allows them to keep one incubator fairly clean without all the dust and dander.