WTS Engeneering image (decrypted) of plotter firmware hdd , price - 0.3btc.
https://www.youtube.com/watch?v=SFBYfEREUVM&lc=UgyZnCluJlegrK9xBGV4AaABAgAfter buyng you can multple clone hdd and sell it on ebay for 300$ each.
HDD HP 3XB77-67008/Y3T75-67008
MODEL NEPTUNE
6kd23-60008
3XB77-67008
Y3T75-67008
for
HP DesignJet T1700 1708
HP DesignJet z6
HP DesignJet z9+
HP DesignJet t1600
HP DesignJet t2600
HP DesignJet XL 3600 MFP
Also we have hp t790\t1300\2300 and etc. engeneering image for sell for 0.2 btc.
Also we can make for you any image for HP plotters, time for work 2-3 month.