A complete set in good condition would be worth # 375 up., but some single volumes are listed at $42.50 at www.bibliofind.com.Someone interested in collecting old books might want such, but ballad scholarship has come a long way since then, and most of the 16th and 17th century broadside ballads are available in later more scholarly editions, or on the Bodley Ballads website. Steve Roud's broadside ballad index covers a lot of 18th century ones, as does the Bodley Ballads website. I have the reprint of the c 1725 'Old Ballads' and have listed all in them in the broadside ballad index on my website, but they really add up to very little, because imprints of the broadsides are missing, as is any licensing information. In short, we don't know when or where they come from. [A few in these 3 volumes come from early 17th century garlands, and were never actually published as broadside ballads.]