Old kits
One thing about old wood, though. If it's dried out too much, some CA glues may have trouble curing. A bottle of kicker will see a lot of use, since it's the trace moisture that kicks off the glue. CA glue will take longer to cure with really dry wood.
If the wood's too dry, the thinner sheets will tend to split easier. The tensile strength shouldn't be compromised, though.
bax