Some coax adapters here, prices are per piece.
no chinese ebay crap, all quality brand connectors.
slightly used but still good and tested with a network analyzer to 11 ghz and some to 18 ghz
RADIALL 18GHz 50ohm SMA (APC3.5mm) male to N female 10 euro
datasheet: r191326000en-595441.pdf
Various 50ohm SMA female to N male 5 euro
The Suhner gold plated version is 10 euro, very low loss.
One new Suhner gold plated available for 20 euro
Various 50ohm SMA male to N male 5 euro
The Suhner gold plated version is 10 euro, very low loss.
also new Suhner gold plated available for 20 euro
Various 50ohm SMA female to N female 5 euro
The RADIALL version is 7.5 euro.
datasheet of the RADIALL: R191381000EN-855186.pdf
Midwest Microwave 50ohm 18GHz SMA male to N female 15 euro
datasheet: 2578-NF-SMM-02.pdf
Various 50ohm N terminations
suhner 0 to 6ghz 1watt 4 euro
xma 0 to 12.4ghz 2 watt 5 euro datasheet: 3001-6113.pdf
Various 50ohm pasternack adapters 3 euro
Pasternack 75 ohm male N adapters 2.5 euro
datasheet: PE9308.pdf
Pasternack 75 ohm female N adapters 2.5 euro
datasheet: PE9416.pdf