Ask HN: I Have No Idea How to Get to my Target Market

This is the purpose of marketing, and advertising in particular: informing your (unaware) market that you exist. Lots of marketing and advertising 101 texts out there.

Find places where your target market congregates, and find ways to target them individually.

I'd imagine your target market is generally deal-savvy. I also assume you've done research and determined that there's a portion of the market that is deal-savvy but doesn't like the "hunt" or the "chase" of tracking down the best deal themselves, and that that segment was worth making a product for. I'd advertise on sites which attract deal-savvy shoppers, like Woot and Slickdeals, both of which have their own advertising offerings and don't just use AdWords/DoubleClick.

You can't find a person when they're in the mood to go electronics shopping, but you can find the product they're looking for. I'd take out Google Adwords ads for brand names, product names and model numbers. Amazon and eBay affiliates do this in bulk already. Maybe don't choose the best sellers in a category, since those might be expensive spots, but maybe the second-tier products to start?

Maybe what you you need to do is ad retargeting. See this post on how to spend money effectively on this http://okdork.com/2014/05/21/how-to-spend-your-first-100-on-...

Have you thought about re-evaluating which product verticals you go after first, based on cost of Adwords (or similar PPC) clicks? Sounds like your site/search solution can be targeted to any product bought over the web, so maybe you should re-consider which product searches to focus on as a matrix between the overall attractiveness and the marketing cost to get your initial users. I haven't looked at the cost of PPC for different verticals in a long time, but I'm pretty sure electronics is a very competitive vertical.