i'd say go for it. not many people around here sell amsoil products. the only one i can think of is Precision Tuning Motorsports
www.precisiontuning.ca. i never bought any amsoil product from them, but some diesel purge...
i bought my amsoil online and am pleased with it. i like amsoil products, filters etc. there is definitely a difference in cold starting with amsoil, and with our cold winters we can benefit from it.
one word of advice, and this is more of a business tip, but remember that you'll have to work hard to get a client base and work equally as hard to keep it. some people think that they own you for that little 5-10% that you got from them...

another tip is to only sell in bulk. selling a few bottles here and there can be quite time consuming. an idea is to setup oil change packages including necessary filters & oil, and add bonuses like fuel treatment. most people these days know the value of buying in bulk.
but thats all i have to say! its going to be a commitment, so if you're not sure, then don't do it!