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A friend is moving and selling his Bob Ibex trailer. The Ibex is the Bob trailer model with a shock.

http://www.bobgear.com/bike-trailers/ibex

He's asking $240; it is in excellent condition (only used a few times, as I understand it). MSRP is $409 and street prices is $350+. Note, if you have a rear thru-axle, you can get a thru-axle adapter here: https://robertaxleproject.com/bob-trailers/

I'm only saddened that this wont' fit my gravel frame (due to my recessed thru-axle dropouts), as having a smaller post-kids-trailer option for hauling stuff would be nice.

He's not on the forum here, but if you PM me with your email address I'll put you in touch.