I have just released a new feature that I wanted to write a bit more about than the usual monthly quick update. There is now a new Buy Sets page accessible from the main Sets menu that lists all the known pricing data for each official LEGO set. This data to date has been obtained from Amazon and the LEGO Online Shop. All pricing data is updated daily.
I have tried to make the data as searchable and accessible as possible. The page will only show at a maximum the top 100 results as there is just too much data and paging through it is pretty pointless. However, there are many filters you can use to narrow down the search to what you are interested in. Also, any column can be ordered by clicking the table headers.
The default page will search through every set's data and display the most discounted stores/sets. By default it will show all prices in your local currency, but you can change that.
While building this feature I noticed that the majority of the historical data I had saved from Amazon was a bit dodgy. Specifically - the results were including offers from third party resellers on Amazon who like to list very cheap prices and tack on high delivery fees. So as of 18th Oct 2014, I split the stores into Amazon Only and Amazon + Resellers to highlight the difference. Then I added the "Ignore Suspicious Results" checkbox to the filter to hide them. It basically just looks for sales from the Resellers with a discount greater than 50% and assumes they are probably not real.
Also some of the Amazon results may refer to incorrect search results. For example the 21108 Ghostbusters Ecto set actually uses the 42002 Hovercraft results for some strange reason. I have not been able to find a decent dependable way of checking if the Amazon search feed results are correct. If you have experience using their Product Advertising API let me know!
If you click the little chart icon you will go to a page with charts (surprise) of all the known history price data.
These charts look a little busy at the moment, but you can zoom in and toggle each data series by clicking on the legend. I might continue to tweak the default view to make it easier to understand.
What does everyone think of this feature, is it something you are likely to use? I have been a bit hesitant to add this for a while now, as there are other sites out there that do similar things. Also, I want to add a "Watchlist" type feature where you can put a watch on certain sets/stores and when the price drops below some defined threshold you will receive an alert. Any ideas for making that more awesome than just another source of spam?
I'm not one to talk much about the site's costs or revenues. However, I want to make this one brief mention of it. Despite the fact that Rebrickable has been steadily growing in popularity and traffic, the revenue has actually been dropping.
Rebrickable supports itself through a variety of methods, with the biggest component being "affiliate sales". If you aren't familiar with this it works as follows: when someone browsing Rebrickable follows a link to Amazon/eBay/LEGO shop and then buys something, Rebrickable is paid a small % commission of the sale price. There is no additional charge to the buyer.
So, obviously, all the store links on this new Buy Sets page are affiliate links and using them will help generate revenue for Rebrickable. With Christmas coming up, it would be great if you could show your support :)