Help with "G" date purchase, please.

[ssmandavid]

Hello all.
i have a chance to purchase a luger from a retired gentlman but i do not know much about them and do not want to spend $$ on a book for only one purchase.

The Luger is a "G" date [ 1935 ] S/42 marked commercial version, i think.
it is in over all good condition but is mis-matched.
the frame number is - 234X no letter code.
the receiver number is - 719X no letter code.
on the right side are W154 & S92

the magazine is marked "Germany" and has no other markings.

here are 4 photo's to help. sorry they are not to good but my camera does not have a macro setting.

from what i have read on the auction sites it is worth around $500 to $600.

any thoughts on value and condition will help.
whats it worht??? how much should i offer???

thanks, Dave