I do not want to hurt anybody's feelings, but I would not pay over 300 bucks for bator like this.
Cabinet looks solid and nicely finished, but heating with only one bulb close to upper egg level and then lower eggs level being farther from single bulb on side wall is rather primitive solution for a "cabinet incubator".
Upper eggs will be hotter due to bulb radiated heat, and lower eggs are shielded from the bulb by upper eggs. One fan will not make up for this basic design flaw.
Cabinet incubators have a wall dividing heating compartment from incubation, then 1 or more fans blowing the air forces the air to go down through assuring even temperature distribution for 3 or more shelves.
I bet this bator will run a significant temp difference in temperatures between upper and lower shelf and through various spots on turners.
This perhaps can be fixed but some work and desing changes will be required.