I'd recommend Godaddy to do your hosting.
If you want quick sales pages and good sales results, I'd also recommend Godaddy Marketplace. Godaddy gets millions of unique visitors daily and Amazon would be an easy compliment to it.
As far as auctions go, I would truly just investigate the market yourself. Don't assume that eBay is really the big guy on the block, because it isn't anymore.
Bonanzle is fairly huge now, Dawdle is pretty big as far as electronic supplies go, and iOffer.com also gets a million plus visitors a month now.
It really just depends on what is in demand, and what can not be easily found at the time. Everything from iPod accessories, movies, bedding and clothes by un-named brands, and other equipment is selling very quickly out there if you simply research the market.
In fact, I recently sold some great products right off of iOffer with no trouble right through my store. At iOffer there is over 70,000 registered sellers and buyers usually online at one time now, at Bonanzle there is considerably less, but all of them are getting big.
The days of eBay dominance on auctions and letter pages is long since over. I had sold nothing there for quite a while until someone in family hijacked my ebay account to sell a bar juicer.
So I opened another secure account on my own and had some mild success, but it's nowhere near as good nowadays so remember get into a merchant account if you want this as a 'business'.
Including Godaddy Marketplace as the first place you stop.