I would like to find my purchase date of my iPad. Ready to buy another one soon and wondering how long I have had this one.

If you are unable to find your purchase receipt, you should be able to estimate the age of your iPad if you use Apple’s Warranty Coverage Checker:

Check Your Service and Support Coverage - Apple Support

The age of your iPad, regardless of when you purchased, will be based on its model/model number.

What year and model iPad do you have/own?

The “A” model number can be found on the aluminium back of your iPad, in small print, right under the larger bold print “iPad”.