I find that when selling to the blog market it is hard to get very high prices, since usually you are selling to individuals just starting out and they don't have much in the way of resources at the start. A lot of "blog" related .com sales go for about $100 to $300. Like in December blogola(.)com went for $202 on GD (most of the blog word sales seem there). The word blogivists went for $115 very recently. I hope you get more, but if it was mine I would regard anything over about $200 as a reasonable sale.