What constitute a collection?

[Dalil]

Hello everyone.

I hope you are well.

I have been a follower of this forum for the past 6-7 years.

I love calculators, I have been in the pursuit of the best engineer calculator.

For my job, the TI-86 has been deemed the ultimate, dealing with complex and real calculations like no other, at a price achievable for most of the young folks.

Other ones, like the HP-42S, have been part of dream that never happened, as all HP I have ever acquired for a reasonable price seemed weak and not worth the expenditure.

What is a collection I ask? Is it what you could rest on and build a tower, or is what you could afford and show off?

Excuse my non-englishism, not a native.

Dalil