I’ve always thought the Hungarian pisztoly FEG 37M Femaru was one of the sleeper Axis WWII-era pistols when it came to deals, and have been fortunate enough to pick them up in recent years for as low as $400, still in excellent condition.

I mean look at that gun– picked up for $380 just three years ago, complete with Royal Hungarian Army marks.
Of course, German-marked martial examples– they were popular with the Luftwaffe– run much more, and non-import marked “bring backs” earn a premium, especially if they have paperwork.
For illustration, I noticed this beautiful circa 1943 specimen at the recent Milestone auction:

Graded “near-pristine,” this recently discovered, fresh-to-the-market gun came to Milestone together with two magazines with matching serial numbers, and capture paperwork dated 2 October 1945 and made out to Lieutenant Colonel Richard C Dickinson.
In its first public appearance, the above pistol exceeded its $3,000-$5,000 estimate to reach $7,500, proving M37s may not be a sleeper any longer.
Heck, that’s Luger money…