Sometimes I would be more willing to buy the instructions for "whatever" than the actual item.
Examples:
The quilted casserole carrying thing
The crocheted nylon scrubbies - but I'm willing to buy those if not overly expensive. The lady in our park still charges only $1.00 each for them.
Or maybe sell a list of where you obtained the instructons for various items
You could put up signs next to some of the items like this:
You can make this yourself for only _______
Then list the equipment needed (cost of)
Materials needed (cost of)
Time needed (variable)
Value of time/labor needed (cost of)