usually around $325-375.....
No published sn data I have seen.
Not familiar with a "Max-1"- but with ANY gun, get the owner's manual from the maker (most are on line) and follow the manual.
50-275 USD or so
if the firearms is deemed (discribed) as a pistol then you would need a permit to purchase.
about $250 max
Th last two digits of the serial number are the year of manufacture
That would most likely be the Hatsan AT P2 PCP Air Pistol at 870 FPS
For a 9mm PISTOL- effective range is about 50 meters. Max range about 960.
£265
$2.00
75-225 USD In 2010 the MicroMax 380 "excellent" used is bringing $300+. The old mini 380 is only a few bucks behind. Practical differences are moot. If a "rough one" shoots well it will still bring $200 min.