That's a decent enough price IMO - maybe they don't oversell? In which case, say they can use 3 TB with their server, they could host 60 customers @ 50 GB bandwidth, resulting in $1,200 from that server which isn't all that high when you factor in staff costs, server costs and everything else.
OP, have you searched around for reviews of them? Another good thing to do is contact their sales team and see how quickly they respond.
May I ask you what kind of site you have?
Make sure that you need that before signup. I assume the best would be talk over that with one of their representative
Prices which simplehelix.com offers are not high, they are justified.
I have read some reviews of them and the greater part of them is nice.
As I know they have qualified support which is responsive and helpful.