Find great deals on eBay for colloid mill. Shop with confidence. Skip to main content. eBay Logo: ... STEIN M-2 Colloid Laboratory Sample Mill High Speed Grinder Impact Cutter. Pre-Owned. $1,299.95. or Best Offer ... Fryma MZ-50 Vertical Colloid Mill, Ship World Wide. Pre-Owned. $2,999.00. Free local pickup. or Best Offer.