I had also spotted them on eBay and put a bid against both. I had done this before seeing your post, as I had signed up for eBay alerts for these items.Ebay has a Red and Midnight Blue for sale as of this morning.
Maisto put out an OPEL GT in black way back when. Very hard to find these days.
I have one. I wish it was bluestone instead of black. But I like it.
I got it on ebay about two months ago.
I just checked... I found two Redlines but no Opel-GT.