What to look for specifically.
An aircraft that is worth going through the additional hassle. Either priced right or with exactly the set of features you are looking for.
Does the specific foreign country come in to play as far as what needs to be done?
Yes.
Some countries have maintenance regs more comprehensive than the FAA requirements. Planes from these places are usually well documented and whoever does your conformity inspection won't have difficulties finding the information he needs (e.g. about STCs, compliance with ADs etc.). Of course, that is easiest if the maintenance records are in english.
In other places, maintenance requirements may be very formal, but in reality things are handled less formal. Maintenance records may be spotty or nonexistent. Maintenance may have been done using undocumented parts etc.
What kind of additional cost is there to complete the transaction?
Depends a bit on where the plane is. Buying a 185 in Ontario and flying it to Michigan is going to be less of an expense than crating up a plane in Thailand and shipping it stateside.
Is there a lot more risk in this type of transaction?
Again, depends on where the plane comes from. A couple of sources of risk:
- How does the country record ownership and liens ? You dont want to complete a transaction and then find out that there is some sort of lien on the plane or that the party you are talking to doesn't have legal authority to sell the plane.
- You need to invest money in travel, possibly bring a mechanic with you to inspect, pay a local shop to work on the plane without knowing that the transaction goes through. The risk is that you spend all this money and a transaction doesn't go through.
- The plane needs to be either ferried or crated. Some of the risk in that can be insured, some can't be insured.
So, buying a common US built plane that just happens to be registered in Canada can be a transaction no more complex and risky than buying a plane a couple of states over.
Otoh, buying a chinese built plane with a russian type certificate that is stored in pieces in a barn in Botswana may be a bit more complicated.