Welcome to the board!

First of all, I'm so very sorry to hear of the passing of your beloved cockatiel. 3 years is so very young for a tiel. They very often like into their 20s-30s. I'm so sorry. Its so hard to lose a pet, but its even more difficult when their time comes so soon.

I'm not sure how much quakers cost from a breeder. Quakers aren't very common birds in my area, so I haven't ever done much research on them. I know they are wonderful birds though, so its a great choice for a new pet. You might be able to find their average cost by doing a search on the web for breeders in your area.

Your pets all sound wonderful, and we'd love to see pictures of them! I have two cockatiels whom I love dearly. You can see them both in my signature.