first looks like the 3/4 size New Home (think it's Arrow class) I bought a prestine one off ebay for around $100 plus shipping.
Second is a chain stitch, I don't know much about them but that seems like a very high price.
Last is a very common hand crank Singer pinker - you can pick one up off ebay for around $20 most days. If they had the box and instructions in perfect condition, maybe up to $45. If you don't want to wait, you can probably pay top price on a Buy it Now of $65 . Shipping should be under $15