The question on the use of the Past Perfect Tense

The question on the use of the Past Perfect Tense





The following are conversations between my friend and me.

Case 1

A: This is my new laptop.

B: wow, it's cool. I had (once) had some thought of buying a new one, but I did't have enough money.



Case 2

A: This is my new laptop.

B: wow, it's cool. I had some thought of buying a new one last week, but I did't have enough money.



Case 3

A: This is my new laptop.

B: wow, it's cool. I had (once )had some thought of buying a new one, but I did't have enough money.



Which one(s) is right?



Here is my thought:

When I want to tell the friend that I had a thought of buying a new laptop on a unspecific day in the past, is it right to say “I had (once) had some thought of buying a new one”

When I want to tell the friend that I had a thought of buying a new laptop on a unspecific day in the past, is it right to say “I had some thought of buying a new one”





Thanks for your help?