I don't know if this has been suggested before (sorry it has), but I think the egg market could use some changes.

First, it would be nice to know how incubated the egg you want to buy is. People may be willing to pay a bit more for a fully incubated egg.

Second, something that tells you how old the egg is, in case you want to buy a bit in advance, so you don't end up with one that spoils the next day.

Finally, its a bit annoying how it automatically reloads each time you change a field, especially if you want to change all the fields and your computer is slower.