What do you tell your sellers or  buyers about aluminum wiring if you find it in a home you are selling ?

It seem that there are 3 solutiuons to the discovery of aluminum wiring in a home.

1. Get the wiring replaced ( cost LOTSA $$$)
2. Get the wiring pigtailed (Still cost Mucha $$$)
3. Have a certified Electrician check each ourlet or fixture to verify that all wires are secured tightly.

In my 25 years of selling, I have had all 3 options occur. I am looking to see what you did with your last experience?