How many people here generally buy used?

I used a number of factors to determine if I purchase used or new, including: 

How good is the deal?  If used is 5% under new, I'll just go new.  If I can save 30-40% used I'll go for it.

How often does the product pop up on the used market?  If it takes a long time, I usually loose patience and buy new.

Does it have a lot of moving parts?  E.g. a complete turntable vs an amplifier.  If there are lots of bits that can break I will lean towards a seller with a decent reputation.

What is the state of the technology?  If it's a class A or AB amp vs a class D. I'd go used for the A/AB and new for D because that tech is still evolving.  DACs are a similar example.

Mark

Eh, kinda 1/2 & 1/2, but I like trading gear too. 

Mostly used about 80% except for tonearms and cartridges those I always buy new.

"How many people here generally buy used?"

Only two items were purchased new. Oddly both of them preamplifiers. A Yamaha CX-2 and recently a BHK. 21 years apart in time. Maybe that provides enough time for one new purchase?

TT, phono preamp, speaker cables, interconnects, power cords all new. Amp, CD transport, DAC, receiver, speakers, subwoofers all used. Why? Don't know. That is how it played out. It was time to make a move and that is where I ended up. Could have played out different if the circumstances at that time dictated otherwise.  So I guess 50-50 but not wed to that model. Very easily could have been 75-25 or 25-75.  Just depends on timing.