for these things you must consider stocking and marketing cost, not only manufacturing.
the manufacturing process is easy but to transport them, stock them, and the sales volume is not high, so the price must be a certain level to maintain the dealer's profit margin.....
That link to PC Mall worries me. It says triple-flange sleeves, but it shows a picture of the soft flex sleeves??? $8 for 3 pairs of tri-flange is hard to believe.
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