How much is this repair?

I'll be looking to sell this lens soon, but have found that typically repairing something works out to be a lot cheaper than discounting. Does anyone know how much I could expect to pay for this? The lens is in pretty good condition except for this.

ETA: it's a non-is 70-200 2.8 if that matters.

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70D, 6D, Canon 135, Tamron 28-75 2.8, Tamron 70-200 2.8 VC, Canon 50 1.4, Canon 100 2.8 Macro, Canon 85 1.8, Canon 10-18 4.5 STM

Franklin NC Photographer Travis Wright

Mike Sowsun / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.4 USM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 100-400 II / EF 1.4x II
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msowsun wrote in post #17446553
That part is only about $25 and is easily replaceable. You just pry it off and use two sided sticky tape to install the new one.

http://www.dpreview.co​m/forums/thread/335506​0

http://www.dhcameras.c​om …0mm-1-4-l-is-usm-genuine/

Awesome. Thank you very much.

I come here for your expert opinion. Please do not hesitate to critique or edit.
70D, 6D, Canon 135, Tamron 28-75 2.8, Tamron 70-200 2.8 VC, Canon 50 1.4, Canon 100 2.8 Macro, Canon 85 1.8, Canon 10-18 4.5 STM

Franklin NC Photographer Travis Wright