The Etymotic Research ER20 Ety-Plug go for $13 shipped at Massdrop right now with a late June delivery estimate, but it looks like Amazon has them beat. Prices start at $10~ for the Red Sterm or clear soft and go to $13 for other color combinations including the ER20-SMC. The usual shipping terms apply, free 2-day for Prime members or with a $49+ order (or $25+ in physical books).
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