Generally the cut off age for egg donors is 32. If you have had previous pregnancies with success sometimes they will make an exception. It is in a large part up to the donor and not the agency that represents you or the donor to make that choice. Family or a friend is a good alternative. You are very thoughtful.
Yes, you can be an egg donor at age 34, however your time to donate eggs is fast ending. You will be required to undergo extensive testing to determine the viability of your eggs as well as your well being.
You can be a donor at age 34, but the criteria must be, your egg must be healthy to reproduce. Otherwise your egg will be a wastage. Hence to reproduce your egg should have its consistency. You can also store your eggs in egg banks that are found these days.
Depending on the clinic you can donate up to age 35. They want eggs donated by women that are in their peak fertility. The main requirements are age and health. They want you to be in good health and not have any diseases. You will have to find a clinic that takes your age group.
It will all depend on the clinic that you go to. A lot of clinics stop taking egg donations from a woman when she hits 30. Others will stop at 34. You best bet is to contact a few clinics in your area that you would go to and ask what their protocols are.
You would probably be considered a good candidate, as long as you are healthy. It can be a daunting process, from physicals to the surgery involved to extract the egg. The surgery has become better through laproscopic methods, it is much less invasive procedure than it once was. It is still surgery, however, and carries risks. Please consider all options.