It's a fact that the majority of the time, profit margins are pretty low when using dropshippers. I found the trick was once you were established was to stock your best selling items yourself as wholesale is cheaper, though then there is risk of being left with stock, time when it comes to packing things up and waiting at the post office, so don't discount dropshippers because prices seem too high.
Take a look around the "Dropship Forum" and get an idea and you can ask expireanced members these questions, though I warn you now that no one is going to tell you thier best suppliers - who needs the competition?
And as for crappy looking sites...
There are plenty of scam artists who will take your money and run who have the most modern, flashy, impresive sites, doesn't count for anything trust me.
And lastly,
Remember dropshipping is just a name for holding stock (or not) when your in business it is retail, a very hard indestry to break into and survive in, and just because online sales are on the increase each year, so is the amount of new online shops opening (and closing) each day.
The saying "you get out, what you put in" is definatly true, just don't think opening an online shop, updating products for an hour each day is going to make your site a success as in the beginning you have to put a hell of a lot of hours in to even see the smallest of returns.
And if that hasn't put you off (hope not) then...
Best of luck