Are you catering only to the detailing crowd, such as those on this site, or to everyday daily driving car owners, or both? That will make a huge difference in what products to offer. Most non-detailing people (the typical money spending masses) are not familiar with many of the products discussed here; they are more familiar with your typical name brand merchandise that they see in your local parts store. A poster above listed these items - Sonax, GTechniq, CarPro, Menzerna, 22ple. Question. Do you think the folks in your area are familiar with these products or those at Advance Auto, Pep Boys, Autozone, Walmart and the likes, such as Mequiars, Turtle was, Armor All, Zymoil etc.? That's a question you need to ask yourself and determine the answer. If you offer products they are not familiar with be ready to educate the public in order to switch them over to such products. Here's the kicker though. Once you educate them about these products, they will start shopping online and more likely than not find it cheaper, say on Amazon. It's done all the time.
It's good to get feedback from a detailing forum such as this, but you have to remember that 99.9% of us are not located in your area and will not be visiting your store to purchase your merchandise, so I would be very careful about putting together a business model based solely on opinions provide here. However, if you plan to be an online dealer, then you may be ok. Good luck.
Just One Man's Opinion
Al
PS: Hey Quebert I agree with your shipping statement and I live way, way closer than you. The shipping costs is what many times kills many of my potential orders. One order was going to be about $22 for some polishing pads - not. The shipping distance between the company and me is not far. Shipping is cheaper from CA. I have my own UPS, Fedex and USPS accounts and wonder if they will allow me to ship via my account.