CHEAP

That's how you spell it. Sorry, but all the "cheep"s in here was making me think of little birds.

As for saving $20, I'd do it. Then I'd go to my LHS (because it's run by a club member) and spend it there. Heck, our club-member-run LHS guy sometimes tells people to just get things from Tower Hobbies. He says that the price will be about the same, and we'd get it faster. Admittedly, this is only for certain items.

And $20 at my LHS would get me two 4.8V 700mAh 4-cell battery packs, or a bunch of props (like 12-15 of 'em). I'd take my savings there and buy some of the extras that it never hurts to have.

As far as knowing what that online shop service is like, sorry I don't know. Just go ahead and get the stuff and let us know how they are.