How long until fertilty is affected?

I bought 6 eggs of 2 different ebay sellers last Tuesday, both were posted last Wednesday. I havent recivced either parcel. How long until fertility is affected by being left unsat or incubated. I know theres no guarentees after going through the postal system anyway, but they have been sat for a week now which reduces the chances of a decent hatch rate even further.

1 of them is trackable, and the seller has given me the number, I have checked it both yesterday and again today, It just says the parcel is in the system for processing. The other seller said he will contact the postoffice and get back to me.
Its got to be 8 or 9 days since they were lay now. Kept in the warm conditions of the postal system thats got to reduce it further 

Yeah I know i need to let them rest Joy, So that adds another day to it, even if they arrive tomorrow its going to be about 10 days since they were lay, 11 by the time I can set them....Not much chance of a great hatch rate, thats if they arrive and hatch!

Just had a look in my duck book (i know your's are hens eggs) and I think the info there is relevant for hens eggs to.

From: Storey's Guide to Raising Ducks. By Dave Holderread.

Length of storage.

Ordinarily, the shorter the storage period, the better the hatch. A few eggs that have been held 4 weeks or longer may hatch but for good results the general rule is not to keep eggs for more than 10 days before setting them.
The negative effect of long term storage periods on hatchability can be seen in the results obtained from a test involving several thousand eggs.


Length of Storage.        Hatchability percentage

1-7 days                       71
8-14 days                     64
15-21 days                   47
22-28 days                   18

Setting eggs.

Start the incubator at least 48 - 72 hours ahead of time and make all necessary adjustments of temperature, humidity and ventilation before the eggs are set. People frequently put eggs in machines that are not properly regulated, thinking they can make fine adjustments after the eggs are in place. This practice is a serious mistake since one of the most crucial periods for the development of the embryo is the first 4 or 5 days of incubation.

                                                      End of book quote.

I personally have never used an incubator and have only used a broodie hen. When I've received eggs through the post I've removed them from their polystyrene packaging and put them into a normal cardboard egg box. I then let them get to room temperature and turn then once every 24 hours. I let them sit quietly for 48 hours before putting under the hen.

I hope this helps and best of luck with your hatching.


OL

Both state standard delivery 2 - 3 days. Estimated delivery was 25th - 26th Jan