I think screenshots and/or provenance will be required to determine the value (and 'legitimacy') of these carts. Chances are pretty good that 'Diag' is a proto -- not a repro -- and you can't discount totally discount items from Video 61, either: you can sometimes end up with a proto from Lance instead of a pirate cart. You just never know.

 

Sadly, I put the value of a Lynx proto in the range of $50-$75 unless it's a really rare item. I'm sure you've discovered that the Lynx collecting scene is static and tiny (heck, you're the most active collector!), and people tend to want to hold onto their rarities rather than trade them away. I'd suggest that your 'BL' demo will attract the least interest, and that 'FB' (regardless of its 'legitimacy') will fetch the most -- you can't get it anymore from any North American source, and it will cost about $100 if you want to get it from Telegames (and if they have it in stock). I would have spent $100 for it before I bought my copy from that eBay seller.

Source: Worth of "released" protos