I have bought a few items from snoctony over time. I have purchased two of his 1000mw 808nm 9mm can diodes, and several of his 2w 808nm c-mount with fac lens. All diodes were good. I like the 2w c-mount for small handheld burners. So far, i have had a good experience with snoctony's diodes. Shipping can be slow, but is now usually free, last year it was $20 USD shipping for a c-mount.