>>>Hi, we expect that you should at least shortlist few products. As when you go for product research then you require to spend some time finding product, manufacturer, discussing price and shipment charges and based on that you calculate margins. Even if you shortlist few then we can discuss and finalize one for you.
Need to spend time on PRT there are lots of things to dig. It looks simple but there are tons of combinations which can help to fetch lot of information. You will know about it when you are start using it. Apply some filters like set Price between 300-500 etc.
And for niche selection go through this link: