just wanted to say a grey will not take to a new owner if it has previously been loved by somebody else.
you must get one from a baby at 12 weeks. they are very much a one person bird.
i breed greys and can tell you without a doubt you will not get a cuddly grey as an adult if it has been somebody elses baby.

you can occasionally get a grey cheaper but usually because they are a biter.
there is a pet shop in rochdale (not sure where you are based) that will sell a baby at 12 weeks. they are rung as all uk birds legally have to be, and cost £525, however they will let you pay in installments. cages: look on your local freecycle website.

another method is buying an egg but i do not recommend this. you pay around £50 for an egg but you have no guarentees that it will ever hatch or if it is a fertilized egg. that said i myself have had 14 successful egg purchases. if you go down this road you will need an incubator and once buba has hatched you will need to spoon feed him/her eggfeed which you can buy from any petshop. failing that you can feed sops(bread soaked in warm milk).feeding will need to take place every 2 hours. cuddles will need to be plenty and a vet visit is a must in the first 48 hours to check for diseases.

please think long and hard before taking on a grey. they live for up to 65 years but they make the most wonderful pets. i would be completely lost without my baby elvis(and yes he does sing lol). i have 14 at present in the aviary but elvis lives with me in my house. he tells tales on the cats when they are misbehaving and on the kids too when up to no good.
there are no secrets with a grey!