Amazon offers Prime members the Felco 24" Straight Lopper, model no. F-200A-60, for $17 with free shipping. (Non-members can get free shipping with orders of $35 or more; otherwise, shipping adds $7.99.) That's the lowest total price we could find by $73. They feature an adjustment key, adjustable blades, and cast aluminum-alloy handles.
Note that it's currently listed as out of stock but can still be ordered at this price.