syed: re selling to shops, do expect them to double your wholesale price (and possibly then some). Being a retailer myself I know they are doing the hard stuff and taking the risk with your product.
As for the 'out of the box' website, I've not actually used one. I was tempted, but it doesn't have flexibility I needed and I got a US web host which I can install a ton of free software on for no cost. The hard part is customising it so it behaves as you want. It isn't easy - I've been a programmer for 20 years, and this is my first web project.
The problem with the out of the box solutions is they do tend to look a little amateur - I would hope my site doesn't.
As far as getting visitors, it is hard work. We promote locally, through parties. We have tried Google Adwords, spent a ton of money on that to little effect. We are getting bloggers to review our stuff (have a look at our thread on the MN business classified for more details).
As far as trust, you have to be open, have a privacy policy, contact addresses etc. Get encryption on your credit card pages etc. The out of a box solutions have that all set up for you.
Having said that we have a slow trickle of orders. It isn't a flood, but at the moment this isn't our sole income.