Roach infested sets were the worst!
We had a few come into the shop that were dragged outside immediately for the customer to pick up unrepaired. We dealt with a few by opening them up outside and blowing them out with a leaf blower. I remember one set that had a burned up flyback due to an HV cage packed with crispy burned roach carcasses.
Had a similar situation when doing some electrical work in an apartment, and cutting into the motherlode of roaches when opening up a kitchen wall to put in a receptacle. Damned things were pouring out of the wall and into my toolbag, parts boxes, etc. Had to empty everything out on the sidewalk outside to keep from bringing any of them into the truck or my home. Told customer to call me after having the place fumigated, and never did hear back. Hopefully too embarassed....