How much to charge for used sewing machines?

My mom recently passed away and I got the fun job of going through all of her belongings. She was really into arts and crafts and sewing etc. She has 2 sewing machines. One is a "White 1788" brand that she bought in 2000. The other one is a Euro-Pro 385x" and she bought it but NEVER used it so its brand new.
What would they sell for? I am about to have a garage sale and I don't know what to price ANY of this arts and crafts stuff. So any help would be appreciated.

The price of the Euro-Pro 385x" you can cut the price of it by 1/2 because that is what the sewing stores mark up sewing machines most times, Then you can take the 1/2 and cut it in 1/2 again and that is the value of the machine, even not used it is second hand.

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