I would simply have the equipment professionally cleaned. That's cheaper than new gear, assuming it's another of high quality (JVC S-VHS VCRs, good DVD recorders, etc).
The computer gear you can probably clean yourself. Dismantle it, use a brush. Optical drives should all be replaced unless they are sealed when closed, and were closed at the time of the fire.
Sorry to hear this happened to you.
How has your DVD collection faired? I know you have quite a list of goodies that you had collected through the years. I believe I have a few rarer items from you, and could always send back some copies if needed, in time.