[Android Q&A, Help & Troubleshooting] ChriMo:
I would like to understand which device under €150 (new or used) has stable! CyanogenMod CM12.1 and CM13 in a promising state and fits best my criteria:

4.3 – 5.2″ Display,

Battery with above average running time, greater then 2000mAh,

at least 1 GB RAM,

at least 8 GB RAM and microSD SD card slot,

Camera with "best or good in class" pictures, flash,

GPS usable for car navigation,

Desirable: 720p HD display, DualSIM, Compass, removable battery, slim display borders, 1080p FHD Video, Infrared,

Not needed: 4G LTE,

Not many seem to have official CM13 yet: http://wiki.cyanogenmod.org/w/Devices#type="phone";cmversions="13";

Google Nexus 5 hammerhead bullhead Google Nexus 5x bullhead m8 HTC One (M8) m8 m8d HTC One (M8) Dual SIM m8d f400 LG G3 (Korea) f400 vs985 LG G3 (Verizon) vs985 h815 LG G4 h815 otus Motorola Moto E 2015 otus falcon Motorola Moto G falcon peregrine Motorola Moto G 4G peregrine titan Motorola Moto G 2014 titan thea Motorola Moto G 2014 LTE thea victara Motorola Moto X 2014 victara bacon OnePlus One

CM 12.1 is broader supported: http://wiki.cyanogenmod.org/w/Devices#type="phone";cmversions="12.1";

Google Nexus 4 mako hammerhead Google Nexus 5 hammerhead dlx HTC Droid DNA dlx m7 HTC One (GSM) m7 m7vzw HTC One (Verizon) m7vzw m8 HTC One (M8) m8 m8d HTC One (M8) Dual SIM m8d t6 HTC One Max (GSM) t6 t6spr HTC One Max (Sprint) t6spr t6vzw HTC One Max (Verizon) t6vzw ville HTC One S ville evita HTC One XL evita g620_a2 Huawei SnapTo g620_a2 d802 LG G2 d802 d800 LG G2 (AT&T) d800 d803 LG G2 (Canadian) d803 ls980 LG G2 (Sprint) ls980 d801 LG G2 (T-Mobile) d801 vs980 LG G2 (Verizon) vs980 d855 LG G3 d855 d850 LG G3 (AT&T) d850 d852 LG G3 (Canadian) d852 f400 LG G3 (Korea) f400 ls990 LG G3 (Sprint) ls990 d851 LG G3 (T-Mobile) d851 vs985 LG G3 (Verizon) vs985 e975 LG Optimus G e975 e980 LG Optimus G Pro e980 h811 LG G4 h811 h815 LG G4 h815 mb886 Motorola Atrix HD mb886 targa Motorola Droid Bionic targa obake Motorola Droid Mini / Ultra / MAXX obake spyder Motorola Droid RAZR/RAZR MAXX (CDMA) spyder xt926 Motorola Droid RAZR HD/RAZR HD MAXX (CDMA) xt926 xt907 Motorola Droid RAZR M xt907 condor Motorola Moto E condor otus Motorola Moto E 2015 otus surnia Motorola Moto E 2015 LTE surnia falcon Motorola Moto G falcon peregrine Motorola Moto G 4G peregrine titan Motorola Moto G 2014 titan thea Motorola Moto G 2014 LTE thea osprey Motorola Moto G 2015 osprey quark Motorola Moto MAXX quark ghost Motorola Moto X 2013 ghost victara Motorola Moto X 2014 victara umts_spyder Motorola RAZR/RAZR MAXX (GSM) umts_spyder xt925 Motorola RAZR HD (GSM) xt925 bacon OnePlus One bacon find7 Oppo Find 7a find7 find7s Oppo Find 7s find7s n3 Oppo N3 n3 r7plus Oppo R7 Plus r7plus superior Samsung Galaxy Premier superior i9100 Samsung Galaxy S II i9100 i777 Samsung Galaxy S II (AT&T) i777 d2att Samsung Galaxy S III (AT&T) d2att d2spr Samsung Galaxy S III (Sprint) d2spr d2tmo Samsung Galaxy S III (T-Mobile) d2tmo d2vzw Samsung Galaxy S III (Verizon) d2vzw jflteatt Samsung Galaxy S4 (AT&T) jflteatt jfltespr Samsung Galaxy S4 (Sprint) jfltespr jfltetmo Samsung Galaxy S4 (T-Mobile) jfltetmo jfltevzw Samsung Galaxy S4 (Verizon) jfltevzw jfltexx Samsung Galaxy S4 (International LTE) jfltexx i9500 Samsung Galaxy S4 (International) i9500 ks01lte Samsung Galaxy S4 LTE-A (GT-I9506) ks01lte jactivelte Samsung Galaxy S4 Active jactivelte serrano3gxx Samsung Galaxy S4 Mini (International 3G) serrano3gxx serranoltexx Samsung Galaxy S4 Mini (International LTE) serranoltexx klte Samsung Galaxy S5 klte kltekdi Samsung Galaxy S5 (AU) kltekdi kltechn Samsung Galaxy S5 (China) kltechn kltespr Samsung Galaxy S5 (Sprint) kltespr kltedv Samsung Galaxy S5 (Vodafone) kltedv klteduos Samsung Galaxy S5 Duos klteduos kltechnduo Samsung Galaxy S5 Duos (China) kltechnduo rendang Smartfren Andromax Q rendang taoshan Sony Xperia L taoshan nicki Sony Xperia M nicki huashan Sony Xperia SP huashan yuga Sony Xperia Z yuga togari Sony Xperia Z Ultra togari togari_gpe Sony Xperia Z Ultra (Google Play Edition) togari_gpe honami Sony Xperia Z1 honami amami Sony Xperia Z1 Compact amami sirius Sony Xperia Z2 sirius z3 Sony Xperia Z3 z3 z3c Sony Xperia Z3 Compact z3c z3dual Sony Xperia Z3 Dual z3dual odin Sony Xperia ZL odin dogo Sony Xperia ZR dogo crackling Wileyfox Swift crackling cancro Xiaomi Mi 3, Mi 4 cancro lettuce YU Yuphoria lettuce tomato YU Yureka / Yureka Plus

The following devices seem interesting:

Motorola Moto G 2014 ("titan") new €145, used €105 - CM 12.1 + for exampe Monsterkernel seem to work very well

Samsung Galaxy S4 (International) ("i9500") (new i9505 €286), used €145

LG G2 ("d802") (new €250-299), used 130

Samsung Galaxy S4 Mini ("serrano3gxx") or ("serranoltexx") new €180, used €108

Still too expensive

HTC One (M8) ("m8") new €341, used €193

Motorola Moto X 2014 ("victara") new €219-294, used ~€204

Some devices with good unofficial or upcoming CM support?

LG L90 D405 new € 159, used €78

Samsung Galaxy S3 Neo i9301i new €168, used €115

LG Electronics G3 Beat (aka G3S) D722 new €162, used €126

LG G2 Mini new € 155, used €82

Motorola Moto E 2nd Gen. (2015) new €125, used €88?

Samsung Galaxy S5 Mini G800F new €160/222, used €180

LG Leon LTE C50 H340N new € 105

LG Spirit 4G C70 H440N new € 126

Sony Xperia M4 Aqua (new €190) used €158