This website describes and dates bottles (or google guerlain bottles old ebay)
I am no expert at all, but eur 250 each sounds too much even for reformulated Guerlain, but I'll let others discuss the pricing. I found a big round bottle (like your second) of Shalimar for $85, though it was an antique store that I don't think knew much about perfumes. I also saw an empty Mitsouko bottle + package like your third one for $25.
I remember reading somewhere in this forum that Mitsouko (I presume the bergamot top) doesn't keep well, so the fact that they have been lying around in a store is not ideal.