Hey guy, if the IgorT units are not scratched or flawed, I think $70 is kind of low! These lasers are covered by Igor to be up-graded or diode replaced with a life time warranty on driver and case, so these are not just anybody's builds! Also the 405 nm is a longer wavelength and w/ glass lens w/b near 150 mW and if I guess correctly, with long wl, it s/b about as bright appearing as a 200 mW 405 nm! Best of luck getting a good price Cxrazy!