I'm not trying to rain on anyone's parade, but there is so much more involved in evaluating multiple auction prices that requires human involvement for a coin of "like" similarity. Though a laudable effort, IMO mere screen scraping and applying 'canned' metrics, qualifiers, and statistical analysis still won't cut it.
I definately understand. And when you look at past auctions for a coin in a certain grade, you see a wide range of prices. Some coins are just more desirable than others. And then there are things like coins in PCGS green holders going for premiums because they are likely undergraded, etc. But the market analysis is still likely worth something. I don't think the purpose of such a feature would ever be to tell someone what the value of their coin is...just to offer guidance. Besides, a screen scraper could download and save the picture of the auction piece so you can compare what the coin looks like with yours. Imagine logging in, viewing your coin inventory, click on one of your coins and optionally look at all the coins that have recently crossed the auction block to see how yours stacks up. You could display them all on the same page to make comparing them easy, then optionally click to view high-res images for more detail. Of course, it's no substitution for being able to examine it in person, but it would be pretty cool.
That would be very cool. Not just for coins, but for pretty much all collections. Coin collectors are lucky because there is a ton of data out there that can be used to evaluate "market price". Other collectors aren't so lucky. Imagine that you are an electronic hotel key card collector. How the heck do you figure out what your collection might be worth? A lot of people wouldn't care, but some people might. I think pulling data from ebay, etc... is a fantastic idea. Thanks for the feedback everyone.
I have used Coinmange in the past and still do to some degree. Keep in mind that this program while not bad from the box kills any modifications you make to it when you do an update. I stopped doing updates to mine in 2007, just use it for inventory purposes, buy sell dates and what I have into a coin monetarily. Try and get support from Liberty is like pulling teeth .. never mind, family show here. Personally, I would not recommend coinmanage as something for pricing or anything out of the ordinary. Lots of duplicate entries, the coding is terrible, its based on Access but the tables are screwy..
I use CoinManage, the 2009 version. I have yet to see any modifications I've made get lost after I've applied updates.
