Make your own, all you need is a cooler or small fridge (which can often be found for free) and keep in mind that the single most important piece of equipment is a reliable thermostat which will run your about $100 alone.
Many small incubators are expensive compare to the little room they have to offer not to mention that their thermostat is not something I would trust with something as important as my eggs.
Now if you want to invest the money there is C-Serpents and Nature Spirits.
t this point an incubator is not something I would worry about even when your female ovulates you still have 45 days to have your incubator ready and running.