First off, this is a neat project. I don't buy hardware often, but I think your idea creates value here (and could be applied to other industries too).
I think sharing some of your metrics with us should influence the advice. There is a lot of advice in this thread, but I don't know that it's good advice.
- How long are your users staying on the site for a typical session?
- How many (monthly) actively users do you have? Do users return or really just come once?
- Where do your users come from? (traffic source)
- What are the typical price ranges your users search for?
- What kind of parts bring in the most revenue?
- etc.
Essentially I think you should put together the answers to the most common questions an investor would ask for a seed stage pitch deck.
I think sharing some of your metrics with us should influence the advice. There is a lot of advice in this thread, but I don't know that it's good advice.
- How long are your users staying on the site for a typical session?
- How many (monthly) actively users do you have? Do users return or really just come once?
- Where do your users come from? (traffic source)
- What are the typical price ranges your users search for?
- What kind of parts bring in the most revenue?
- etc.
Essentially I think you should put together the answers to the most common questions an investor would ask for a seed stage pitch deck.