Buy ‘filter’ with Bitcoin Crypto-Currency – Spendabit

iFi LAN iPurifier Pro | Ethernet Noise Filter with Optical Isolation

$299 at Bloom Audio

DJI Mavic 4 Pro ND Filter Set (ND8/16/32/64)

$268 at Scan Computers

Hasselblad 72mm ND8 Filter

$259 at Scan Computers

Cokin 82mm Nuances Vari ND32-1000 Filter

$270 at Scan Computers

(Open Box) sE RF SPACE Reflexion Filter

$268 at Scan Computers

Hasselblad 77mm UV Filter

$269 at Scan Computers

Cokin 77mm Nuances Vari ND32-1000 Filter

$242 at Scan Computers

Cokin Z-Pro (L) Nuances Clearsky Filter

$266 at Scan Computers

HOYA 82mm Variable Density II Lens Filter

$253 at Scan Computers

Hasselblad 77mm ND8 Filter

$269 at Scan Computers

Hasselblad 62mm UV Filter

$233 at Scan Computers

Cokin 72mm Nuances Vari ND32-1000 Filter

$233 at Scan Computers

Hasselblad 72mm UV Filter

$258 at Scan Computers

Hasselblad 67mm UV Filter

$246 at Scan Computers

Hasselblad 67mm ND8 Filter

$246 at Scan Computers

Hasselblad 62mm ND8 Filter

$233 at Scan Computers

HOYA 77mm Variable Density II Lens Filter

$221 at Scan Computers

Cokin Z-Pro (L) Nuances Extreme Grad ND16 Filter

$201 at Scan Computers

sE Electronics RF Pro Reflexion Filter

$201 at Scan Computers

Cokin 82mm Nuances Vari ND2-400 Filter

$226 at Scan Computers

sE Electronics Reflexion Filter Pro (Black)

$201 at Scan Computers

HOYA 72mm Variable Density II Lens Filter

$205 at Scan Computers

HOYA 82mm Linear Polarizing Filter

$194 at Scan Computers

StarTech Privacy Screen for Dell U3824DW Curved Ultrawide 21:9 Monitor, Double-Sided Filter Matte/Glossy 38C29-PRIVACY-SCREEN

Cokin 77mm Nuances Vari ND2-400 Filter

$210 at Scan Computers

HOYA 82mm HD MK II CIR-PL Lens Filter

$194 at Scan Computers

Cokin Z-Pro (L) Nuances Extreme Grad ND8 Lens Filter

$200 at Scan Computers

Cokin X-Pro (XL) Nuances Extreme ND8 Filter

$178 at Scan Computers

HOYA 77mm ProND 32 GRAD Lens Filter

$178 at Scan Computers

Cokin 72mm Nuances Vari ND2-400 Filter

$197 at Scan Computers

Cokin Z-Pro (L) Nuances Extreme Grad ND4 Filter

$201 at Scan Computers

HOYA 77mm Linear Polarizing Filter

$162 at Scan Computers

Cokin Z-Pro (L) Nuances Extreme ND64 Filter

$162 at Scan Computers

HOYA 82mm ProND 32 GRAD Lens Filter

$188 at Scan Computers

Cokin P-SERIES (M) Nuances Extreme Grad ND8 Filter

$162 at Scan Computers

3M Blackout Frameless Privacy Filter for 30" Monitor -16:10 PF300W1B

HOYA 82mm ProND 16 GRAD Lens Filter

$162 at Scan Computers

HOYA 77mm HD MK II CIR-PL Lens Filter

$178 at Scan Computers

HOYA 82mm ProND EX 1000 Lens Filter

$162 at Scan Computers

Formlabs Sift Hepa Filter

$153 at Voxel Factory

Cokin P-SERIES (M) Nuances Extreme Grad ND4 Filter

$162 at Scan Computers

Cokin X-Pro (XL) Nuances Extreme ND64 Filter

$178 at Scan Computers

StarTech 31.5-inch 16:9 Computer Monitor Privacy Screen - Anti-Glare Privacy Filter w/Blue Light Reduction - +/- 30° View Security Shield 31569-PRIVACY-SCREEN

Cokin Z-Pro (L) Nuances Extreme ND8 Filter

$162 at Scan Computers

Cokin P-SERIES (M) Nuances Extreme Grad ND16 Filter

$162 at Scan Computers

Cokin Z-Pro (L) Nuances Extreme ND1024 Filter

$162 at Scan Computers

HOYA 72mm HD MK II CIR-PL Lens Filter

$168 at Scan Computers

DJI Mavic 3 Pro ND Filter Set

$160 at Scan Computers

HOYA 77mm ProND EX 1000 Lens Filter

$145 at Scan Computers

HOYA 77mm ProND 16 GRAD Lens Filter

$145 at Scan Computers

HOYA 77MM ProND EX 64 Lens Filter

$129 at Scan Computers

iSpring F3WGB32BM Replacement Filter Pack for 3 Stage 20 Inch Whole House Water Filter, Fits WGB32BM

$121 at Overstock.com

Cokin P-Series (M) Nuances Extreme ND1024 Filter

$124 at Scan Computers

HOYA 72mm Linear Polarizing Filter

$129 at Scan Computers

Samsung DA29-00020B Refrigerator Water Filter Compatible by BlueFall

$135 at Overstock.com

Cokin 77mm Nuances Clearsky Filter

$120 at Scan Computers

HOYA 82mm ProND EX 64 Lens Filter

$145 at Scan Computers

HOYA 72mm ProND EX 64 Lens Filter

$113 at Scan Computers

Polar Pro QuartzLine FX 77mm Mist Filter

$113 at Scan Computers

Cokin 82mm Nuances Clearsky Filter

$136 at Scan Computers