It depends on a few factors like temperature, humidity, how long ago the eggs have been laid when you get them, and how high you will allow them to get before you consider them to be spoiled.
Even in the summer, unrefrigerated eggs should last for a month if not more. Certainly a few weeks without developing any kind of smell. When they do start to smell, the smell is very mild and usually not unpleasant. If anything, they have a stronger taste only, but the smell doesn't begin to get unpleasant until it's been 2+ months usually.
Try and get eggs that have never been refrigerated. Refrigeration probably destroys nutrients and there's a chance that refrigerated eggs will spoil faster when left unrefrigerated.
If it's very hot and humid, like over 30 degrees celcius consistently and with high humidity, they may begin to develop a faint eggy smell within 2.5 weeks or so. But again, this also depends on how long they've been laid when you first get them.
Btw, plenty of people intentionally allow their eggs to get very high for months upon months (in some cases years or even decades) before consuming them.