Can I use Second hand FSX with addons?

Hi,

I would like to buy FSX but I don't know whether to buy the gold edition brand new or a second hand deluxe edition with about 12 addons that is for sale.

My point is that if I buy the second hand sim will I run into any installation problems as the second hand copy will almost likely be registered to the owner who is selling?

This is the list from the add for second hand sim

Microsoft Flight Simulator X Deluxe Edition,
FSX Acceleration expansion pack,
Rescue Pilot mission pack,
Flight tales 1 mission pack,
DHC-6 Twin Otter addon,
F-16 Fighting Falcon addon,
Piper PA-31T Cheyenne addon,
Space Shuttle addon,
Messerschmitt BF109 addon,
Ultimate Terrain X addon,
Ground Environment X - USA / Canada / Alaska addon,
VFR West Germany addon,
Mega Airport Brussels addon.

Any help would be grateful thanks.

Paul