The Chinese stuff even new you'll often be spending time finishing or improving the design. Used equipment you may have the disappointment of it arriving defective when sold as working.
Now if you buy defective stuff cheap you're cutting risks and adding excitement.
As for our valued administrator, we all know how much he loves DSO's, he can't have that much cash to invest (who can claim to live off selling one model of DMM and broadcasting YouTube videos?) so it has to be
WTF
cheap, by the time he's got all the members intrigued enough to want one he'll be buying them and selling them here for four times the price.
Edit: I was wrong again...