A well-rounded music collection is a sign of a well-rounded person, whereas a well-octagoned music collection means that you’ve been listening to stop signs on your turntable. Give the green light to recorded sound with today’s Groupon: for $10, you get $20 worth of CDs, DVDs, and vinyl records at Turn it Up!, with locations in Northampton; Montague; Brattleboro, Vermont; and Keene, New Hampshire.

Named the Valley Advocate’s Best Place for Used CDs/Records/DVDs in 2010 and 2011, the independently owned Turn it Up! has been trading in tunes for more than 15 years. Browsing stacks of new and used vinyl records ($2–$8) and CDs (around $5–10) reveals a range of musical genres, from classic rock to opera to Klingon jazz. DVDs (usually $5 each or $20 for five) join their circular brethren in well-organized, populous racks that invite shoppers to either come seeking specific items or hunt for unexpected treasure.