Quick Question

when other players start to sell their aircraft to the market, but just after the first month

Yes. In the sandbox worlds there are also a fixed number of aircraft of each type that just "appear" on the used market regularly.

Yeah otherwise your best bet would be to wait for an entire fleet to make it onto the market, due to an airline being shuttered from inactivity.

Depending on the airline's size you could probably get a bunch of 8-10 year old aircraft of the same type and engine setup.

When is Concorde available for pre order?

When is Concorde available for pre order?

Concorde begins production in 1976, and the game opens preorders on a randomly chosen day 1-3 years before the start of production. So you can preorder it sometime between 1973-1975.

When is the B787-9 Released in Game?