I have an idea, that could help advertising this website - plugin for browsers.
Your main competitor - ITAD does not have one, but as it was main option for many people it's API was used by the creator/creators of Enhanced Steam browser plugin. This plugin is very popular and in turn it makes ITAD known to people who only installed ES for whatever reason - this plugin has many useful features.
Of course, I do not encourage you to write your own version of ES - while idea is great, because original plugin is abandoned by original author, maybe someone will pick it up (maybe you guys? 🙂) it would be a lot of fork with maintaining it. I think simple plugin that would throw in it's two cents (i.e price/deals info) just the same way that ES does would be enough. You just need to keep track of prices in all regions - ITAD does not have that functionality ... yet.
Plugin might have more functionality - it can add in browser icon, just like many other plugins do. It could be a placeholder for some notifications, show number of deal alerts for currently logged in user etc.