This is the incubator I am using and I love it! The current price listed may not be the same on Amazon. The prices fluctuate dramatically depending on the political/economic/social climate.
This will fit chicken, pheasant, turkey, duck, and the larger coturnix quail eggs. If you are planning to incubate smaller eggs (like just about any other variety of quail), then buy the quail rails for this: https://brendanolen.com/product/little-giant-quail-rails-120-eggs/