It’s a cool concept. The execution is kind of mediocre at best. Grimlock is a terrible leg and his arms mode is noticeably worse than the other two, meaning you're going to have some glaring flaws regardless of which configuration you choose. They’re honestly better off not combining.It's a cool design though, and there are Universe 1.0 lovers out there.
Transformerland has a price guide for ones they've sold. Their average price for a loose but complete set is $51. That seems really low to me though. I'm guessing they're leaving out the shipping price.