This would be a possibility if the Silk Road system had been structured similarly to how I've described in the thread Upgraded Listing Options: http://dkn255hz262ypmii.onion/index.php?topic=182090Now fortunately it's possible to build a system based on the data itself, but it has to be filtered either by an automatic function or sorted manually. There's a very recent reddit thread detailing this concept for weed called You can now search Silkroad by quantity and unit price!: http://www.reddit.com/r/SilkRoad/comments/1jrj3y/you_can_now_search_silkroad_by_quantity_and_unit/I would personally want to see a site driven by the users in regards to data provided, in Sweden ( you might be familiar with this because of your username, but for others reading :P ) we have an excellent site for this for ( legal ) products which is called Prisjakt: http://www.prisjakt.nu/Here's an example on how it looks like in the Graphics Card (PCI-express) category: http://www.prisjakt.nu/kategori.php?&m=350#rparams=m=s136355674The only reason I can see why no one has done this yet it's too expensive and there are no Drug Vendors out there who feel philanthropic enough to invest in a site which does this properly. Some might argue the type of code that would have to be used would be a massive risk in terms of Law Enforcement tracking the site and its users but if this were true the same could be said for sites like Erowid: https://www.erowid.org/I will most likely return to this concept sometime in the future if I get enough time and funds to create a service similar to this as I doubt anyone will do it properly and I strongly suspect the site described in the reddit thread will die out as the user doing it gives up from lack of time or just loses interest. :)