Check eBay "completed listings" to get a general idea of what these things have sold for on eBay (in the last 3 months). Anyone can list an item at any price; it is what the item actually sells for that is a better indication of value.
#1 on your list sounds like a machine quilting frame setup. It helps to determine the brand of frame (the long table like structure).
If you live in an urban area, Craigslist might be your best bet. Second best might be a sewing machine dealership. These are unlikely to get much at a garage sale.