I don't think you have a good understanding of how ebay works. It may not seem logical to you but the majority of people that purchase on ebay like auction style listings because they are hoping to get a deal then when the action is close to ending a lot of them get emotional and bid up the price because they don't want to lose.
Sole Supremacy has sold over 6700 items on ebay since May. You can't imagine how staggering the amount of effort it would take to shill bid those items. Slander has to be logical, this slander wasn't thought out.
Ebay member since '02 - I think I have a decent grasp of how it works. Just because he has a lot of sold auctions doesn't mean he's not shilling up the prices, whether early on in the auction's life cycle or toward it's closing.
Specifically, my point was about early bids. Explain to me why his auctions regularly have higher prices earlier during their duration than identical (or better condition - as in DS) items in other auctions with less time remaining. I always see his auctions (which start at $0.99) well over $80 or $100 almost immediately, with like 6.5 days remaining, while similar items will be at the same price or less with a day or so remaining. It doesn't make any sense.
For someone who prides themselves on their $0.99 starting bids, I very rarely see real steals coming from his listings, and I've watched a lot of them. They almost always go for the going rate for that pair, if not more. I've seen (and gotten) much better deals on DS pairs than he often gets for used pairs.
I just know that I pretty much don't bother watching his stuff anymore, because it just seems fishy to me.
Oh, and slander is spoken -- it's libel in written form.