Do you buy gear new, used, both?

My system is mixed.  Mostly used, but some components were new.  

Mostly used. I've purchased from TMR, USAM, High Performance, and Echo. I do a lot of research and communication with the seller, and always negotiate a better price. I typically pay around 55% of retail and only purchase current or recent models. I would estimate I've purchased $35k retail value for $22k. 

I've had great luck I suppose because everything I've purchased has looked and performed like new. I've had no issues with any of them. YMMV

doesn't matter really, it's with the tech

I have higher cost systems and buy either closeouts or demos.  When dartzeel was having issues I called some dealers who wanted out and got a new cth-8550 for 60% off.  Another dealer wanted out of kharma so I bought those at 40% off.  If I am buying a DAC or streamer I typically buy new to get the latest technology.

used.. vintage mcintosh