I'd say the SCSI card is worth double that. (If its in us dollars that is)
But the bottom line is with an auction, its only what people are willing to pay. Many people have the illusion that items go for high prices all the time when the reality is that sometimes it goes for less than thought. It all depends. Every auction is different. Sometimes you get guys that just want the item as they have been looking for it for years and they go into a bid war. (happened to me when I got in a bidding war for a Live! 2000 board years ago!)