Still a few deals at Fasttech.
https://www.fasttech.com/offers#!/177%3DLED%20Flashlights%7Cp%3D0%7Cs%3Dd%7Cps%3D100%7Ck%3D
Don't click on the products, but select; Add offer to cart....
Most are gone unfortunately.
And some bike lights:
Skilhunt M300 - Flash Sale @ AliExpres
Store: Super Outdoor flashlight Store
https://www.aliexpress.com/item/32267894100.html
W/out battery: 38,60€
W/battery: 47,94€
Marked as spam
how about $4?
is this a good price to your knowledge? does it go on sale often?
Sofirn C01 for just $3.9 (75% OFF) during the next 3 days.
https://sofirnlight.com/c01-aaa-flashlight-5mm-3400k-led-95-cri-or-670nm-red-p0152.html
Imalent LD10, price $8.95, one order per person.
RovyVon A5 for $15.9 and Nitecore Tip SE for $18.9 at Gearbest
Many discounts at Armytek website (i.e Tiara A1 for $18 ).
https://www.armytek.com/black-friday-55/
Check first if they can ship to your country or not.
Want an inexpensive spectrometer? They are on sale:
Amazon has 2 for 1 on some ITP keychain lights, AAA, CR2, 1/3N.
Also, I just found the Wowtac A2S for 25% off on their site.
Good deal here from Olight Uk - LINK
Olight Warrior mini, Olight Obulb and 2 silicone diffusers for a very good £46.97 with discount code - coupon5
For Europe, Samsung 30T for 0.99 euro at NKON. The catch is that they are unwrapped, but NKON sells wraps too, for little. Sounds like a good deal right?
wraps:
Edit: yep, gone 
Out of stock already.
There is a code on Banggood which brings the Astrolux MF04S down to 139$ (120€): Archive topic - Banggood & Fin17 - #2499 by Fin17
You also get a FT03 mini as gift. This may be especially interesting for European customers as the flashlights are shipped from the Czech warehouse and you don’t need to pay taxes. Four MF04S in neutral white are left.
50% OFF for some Armytek series
https://armytek.aliexpress.com/
This Partner A2 is just $22, limited qty.
If you're from the Netherlands, just saw the BTU Shocker on marktplaats: https://www.marktplaats.nl/v/caravans-en-kamperen/zaklampen/m1926876456-btu-shocker-led-zaklamp
for 40Euro
Great modding potentials!