C&L, you're low for pricing from the last few years. Having a fan's interest in the Model 27's and 28's I've watched most of the sales on the EE. Gun's of this condition in the $550 range seldom last long enough to need a bump. And at $500 are almost always gone before needing a first bump. Of course what the seller accepts as an offer is never said but I suspect that when sold in the first week or so that the price is typically at or darn close to the asking price.
Radioactiveman, unless you really hate revolvers you may want to try this gun out before you sell it. The 28's are fantastic shooters with great accuracy with everything from soft wadcutter target loads up to full house .357Mag rounds. The grips may not fit you all that well, they don't fit me work a darn, but those are easily changed.