I can't remember the exact cost about $100 to $150 Aus. I was lucky, my family back home bought it for me for Christmas!

I then paid an extra $50 to sit up front

If its a lifelong dream don't let money get in the way.

Have a look on redballoon.com as that's where my parents got it.

Speaking of flying I wish I saw this when i was there. It would be amazing!

https://www.bookme.com.au/things-to-do/sydney/activity/tiger-moth-bi-plane-adventure-flight/3389

Hope this helps