Mr. Rawles,
[Since they have been superceded by flat screen HDTV technology, many] old projection-type big screen televisions are being hauled away daily to landfills or “e-waste” collection points.
I believe that many preppers who find themselves without sufficient fuel post-Collapse, could benefit from a devices such as the one shown in this video and this video.
This easily assembled solar cooker could really stretch the use of precious fuel supplies, and it would cost “peanuts” to construct. Just about all of it could come from salvaged materials.
Waiting until after a Collapse to begin searching for the components, however, might be problematic, so “strike while the iron is hot.” (No pun intended!) – E.M.