In general terms:
Handmade lace sells for more than machine-made lace.
Lace and linens in good, readily useable or displayable condition sell for more than those in poor condition. Lace that is full of tears,holes, and broken threads, are hard to sell, with a few exceptions.
Lace that has been carefully laundered and lightly pressed or blocked, sells for more than lace that is offered “as is” - dusty, stained, musty smelling, right out of a chest after long storage. Lace that is stained with black grease, ink, rust, or candle wax are very hard to sell. Many will not buy it.