Nice choice.
Check for excessive barrel droop. Hold the rifle on its side and look down the edge of the stock. Extend this sight line down the barrel and any droop will be apparent. Its not a real problem if your using the open sight fixed on the barrel but if you intend to use a peep sight (fitted on the cylinder) or a scope, you may need special droop compensating mounts.
Also if its got 13mm scope rails your choice of o/p mounts may be limited unless your lucky and can find a Apel 13mm o/p
They do appear in the sales section every now and again.
If possible try the rifle over a chrono before you buy.
Some of the early Exports have lovely grained walnut stocks.
HTH
Ian