100-300 USD
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
£265
$2.00
For a 9mm PISTOL- effective range is about 50 meters. Max range about 960.
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.