Do you buy new, used or new or used gear?

Mostly used. I could not afford the system I have buying new.

I have progressed over the years from buying only used gear to buying mostly new, but I do still occasionally buy used gear if it is in great condition. I tend to take less chances on the age and condition of the gear I purchase now, as I want my gear to be in very good condition for when I eventually want to sell it.  I have had good luck with manufacturer upgrades to used gear, which generally results in having a perfectly working latest/current model and a renewal of the warranty.

About half-and-half in my system.... But I prefer buying used from dealers like The Music Room, with guarantees and returns allowed, than from individual sellers, but I've done that too.