You can make money donating your eggs if you live in the United States, Israel, or the Czech Republic. These are the only 3 countries that allow a person to actually sell their eggs for money.
If you live in the United States the amount of money that can be made donating eggs will vary wildly depending on where you live. In large cities egg donation can pay around $5,000 depending on the clinic and in smaller cities and towns you might be able to make around $3,000 selling eggs. In Washington DC the going rate is $5,000-$10,000 for donating.
The town I live in (in the mid-west) pays $3,000 to people for egg donation. They pay $500 one week after starting the injections and another $2,500 once the eggs have been harvested.
There are special egg donors that can command a larger fee. If you went to the "right" college and have the "right" position in life your eggs can be worth more. There are times when certain races are in short supply and their eggs can be worth more. There is normally a shortage of Asian eggs and a highly educated Asian professional could easily make $10,000 per egg cycle if she lives in a large city.
The best way to determine how much you can expect to get for your eggs would be to search for your town/state and then look at a few of the facilities that show up.
Some of the fertility clinics make it a bit difficult to find out just how much they pay. They have to do this little "we know you don't really want money but let us give you a little something" disclaimer so people don't feel like they are being greed for selling their eggs.
A decent amount of money can be made donating eggs and if you are between the ages of 21 and 31 you might want to look into it.