I am eyeing the Octavia as in the title, can anyone give me some suggestions on what to look out for, and if you have any experiences with the same spec?

The car has 122,000km, categorised as "Perfect" by an authorised Škoda service shop/reseller, 1 owner from new, bought locally.
Only thing I would like it to have, which is missing, is the auxiliary heating.
Another question - from the photos of the dealer, the car has Android Auto/Carplay/Mirror link with USB only - I think the unit is an MIB 3 Amundsen? Can the wireless smartlink be unlocked?

Cheers :)

Octavia MK3's only ever had MIB1, MIB2 or online connected MIB2.5 devices. Its probably an MIB2.5 Amunsden unit. You need something like an AAWireless dongle to give you full wireless connectivity (means your USB port will be fully utilised)