I added something to the cart and took it all the way to payment info and they do take credit cards. Usually a scam site will make you pay with zelle or some other payment method that doesn't allow any charge backs. That makes them a somewhat manageable risk if you use a credit card.
Was bored and also hate scam sites so did a little digging. They have a facebook page and also claim to sponsor the Minnesota New Ulm Trade Fair. By any account they appear to be a gunshow vendor judging by the photos and postings on facebook. Postings on facebook go back before 2019.
Michael Emery is an upstanding businessman and he and his brother do indeed organize the New Ulm Trade Fair in Minnesota. Northern Rifleman is not a scam.
For me... just because they don't have a huge inventory could mean they are a small business trying to get off the ground. Takes a lot of money to carry a large inventory. Does not preclude me from buying from them. Kudos to the members who did a search and found the site to be legit!