RE: Combat stuff value?
The red foamy seems to be one of those Don Cranfill RTFs George was selling some time back. I'd put these about 1997-1998 vintage. The Cyclon seems to be a PC5 (swept back, underslung venturi). The Profi looks like a Kozjol. This was NOT a slow engine, they're competitive even today. One of the engines I can't identify.