I suggest you dont buy it from BBTS if you do intend to get it. Somewhere like toy-wave.com or robotkingdom.com or hlj.com will give you a better shipping rate than BBTS
and no they wont be in retail, not unless you live somewhere like Japan or Singapore etc
Bruticus is relased at the end of July this year for your own information
as for your other combiner wants, your probably looking at predaking to be your most expensive, but getting them 100% complete will cost more too. looks like US ebay will be your biggest friend for a while :P
good luck and welcome