Dunno what is wrong with supersound, but I vouch for Goldfries. and if Goldfries let go his goods second hand (i care not about gray or non gray or whatever color set), I would buy it off his hands if it's within my budget and if i'm keen for that particular lens / camera body..
I ventured this path around 3-4 years ago if memory serves me right. I was skeptical at first.. believing new is the way to go.. I bought D5100 + 18-55 new.. and a couple of months went by, and the auto focus in my new 18-55 died for no reason.. i didn't drop it or whatsoever (first camera.. sure sayang kaw kaw).. brought it back to nikon and had it fix.
while waiting for the fix, i bought a new 35mm f1.8 to use.. after 18-55 came back, i never had any problems with it for the past 3 years.. my point for this is, even tho it can be new, you may get lemon copy out of bad luck (retailer / nikon didn't do a con job on me).
on the other hand, i've purchased a AIS 55mm f3.5 lens (you can be darn sure that this lens is 2nd hand and is older than me) and it served me so well that even tho it's troublesome to use, full manual and all, i still unwilling to let it go cause it's just so damn good..
I also bought 2 nissin di622 2nd hand from 2 diff LYN forum-ers and both are going strong till today (2 years +) both product didn't have warranty left. only personal warranties..
i did have a problem when i buy a rangefinder film camera, where the shutter leaf doesn't close well for certain shutter speed, and I told the person i bought it from, he agreed to refund to me.. as a matter of fact, he refunded back to me before i even post the camera back to him..
there are good buyers around, just check well the item before purchasing and check the person's trade history..
i deviated far from the topic and back to topic..
here onward is my own personal opinion from experience:
if you have an experienced friend, bring him along to purchase 2nd hand goods. 2nd hand goods will save you some money which you can invest on other things like another prime lens / flash / tripod and etc
decide mirrorless vs dslr.. as mentioned before by other members, the difference in quality is very small unless you really pixel peep or nitpick on certain details.. mirrorless size and weight would be very encouraging to bring out.. even i myself feel lazy to bring dslr out if i just wanna have a walk.. cause of the size and weight of course.. but for my usage, i prefer control over convenience (the placement of buttons for quick access), that's why i would stick with dslr.. but if you not the type that change parameters a lot, i think mirrorless would be a more enjoyable experience..
how good a photo is, depends largely on the person handling the camera rather than the camera itself.. so dun fret too much about the gears and get one that you like, then stick and learn how to handle it..