How fortuitous, I was going to make a new thread asking about these but here we go!

I'm keen on getting the standard versions of these guys (FT-04 to FT-08, with FT-05 (Swoop?) being blue) + the -G/G2 colour versions (4, 6 and 8 yep?). Of these eight toys, which are the hardest to get? What sort of price would I be looking at for any of these? Would anyone be interested in selling me theirs? Thankfully my completionist streak is breaking and I'm not keen on the X variants nor the diaclone homages (for now) and yeah.

These are good, right?

Hi.