The Cyber Series were all new moulds, but seem to share some similarities to the Authentics and upcoming Cyberverse, which all appear to be having a more unified look to certain classic Gen1 characters. (makes it easier to market them to retailers and the public, and use the same character artwork on each if necessary)
Yeah... after a while to tie up a loose end or two, it is just necessary to pay a little extra to get a one off toy.
Not sure how BBTS got them to sell for $20, as they are supposed to be Universal Studios exclusives, and they sell their Deluxes for US$30 (both regular and store exclusives).
Each toy ended up being about AU$60 shipped, and since the Starscream is about Voyager sized, it doesn't feel as bad paying a little above that price point here... and the rare limited edition Snarl would be about the same as a BotCon deluxe toy.
The first run of Evac in the 2011 TF3 red packaging did sell out (they weren't available when I was at both US themeparks in 2013-2014), so these ones in the 2014 TF4 white packaging must be a second batch that they produced in the last year or two, as they weren't at the California themepark in 2016.
It is certainly not a cheap toy, as their price is always high at the themepark... and then you have to add postage... and our currently falling exchange rate.