Well, i have a different version of hardware care.

Before 1998 i never had any money at all, so every computer i bought i had to sold the previous to get some money.
to get the A500 i sold the Spectrum
to get the A600HD i sold the A500
to get a PC486 i sold the A600HD (i will never forgive myself)
to get a Pentium i sold the 486
and so on...

The only thing i was able to keep was after i start working and start receiving some money:
PS2 i was allready working and getting my own money
Spectrum 48K i receive it as a present and i never sold again it like the old one
A1200 that i bought last year