This is admirable, but seems much more difficult! With electronics, there are a handful of brands and products if you look at a particular piece of equipment. Specs are probably well scrape-able. The dimensions of a TV are not easy to fake/confuse.

With furniture, even the definition of the article/product is not always clear, and there are hundreds of small companies making similar items, and differentiation in features or design that is often not visible / you have to lay hands on it to figure out what the difference in quality is (unless you're going for some kind of nameplate item that is easily recognizable, like an Eames chair). Or the addition of some extra feature changes the nature of the product.

I think the difficulty is like trying to create a clothing aggregation engine if you took all the designer labels off the items. On the other hand, if they are truly interchangeable maybe that's all the more reason they can be compared. But, somehow I think people are more opinionated about finding the right piece of furniture that costs $1000 and not believing that the one from some non-brand website is the one they're looking for.

I'm sure you've encountered all these issues, and I'm no expert. I will be interested to watch how it goes!