Complex sentence: Today, antique and reproduced Sailor's Valentines are sought for their beauty and uniqueness and many Sailors Valentines, both new and old can be found on the Island of Nantucket, Massachusetts.
Split into simpler sentences: Today, antique and reproduced "Sailor's Valentines" are sought for their beauty and uniqueness. Many Sailors Valentines, both new and old can be found on the Island of Nantucket, Massachusetts.