Are they all model M (asking the experts, as I cannot tell from the pics)?
How high does anyone reckon this price could go?
1. Are they all Model M?
They appear to be judging from the wedge shape of the boards as seen from the side, the coiled cables, etc. Looks to be about 16 keyboards in the bundle.
2. How high can it go?
Depends. Who knows what condition the boards are in? They could be crushed, cracked, missing keys, etc. So I would say the value is very very low. They would be lucky to get even $10 for them.
(Krog reviews his boarding ticket.)
Really, they should just hope that someone takes them off their hands. And those boards are very difficult to repair and easily damaged, so, there's that as well. They're most likely junky garbage at this point, not even worth noticing.