AirgunDepot has the Umarex NXG APX refurbed for $30. I purchased a few of these from MidwayUSA a few months ago and I've found them to be pretty serviceable guns.
http://www.airgundepot.com/refurbished-umarex-nxg-apx-youth-air-rifle.html?trk_msg=BARVJFC3SQ14VDPS4P6J2QDDT8&trk_contact=QASV543C035K56F4UMB9TPI4T8&utm_source=Listrak&utm_medium=Email&utm_term=Featured+Deal+%235&utm_campaign=Lightning+Deals&utm_content=Lightning+Deals+12-15-15
Also available here:
http://www.midsouthshooterssupply.com/item/000622251600/NXG-APX-Airgun-Combo-4x15-Scope-With-Rings-point177-Caliber
http://www.airgundepot.com/refurbished-umarex-nxg-apx-youth-air-rifle.html?trk_msg=BARVJFC3SQ14VDPS4P6J2QDDT8&trk_contact=QASV543C035K56F4UMB9TPI4T8&utm_source=Listrak&utm_medium=Email&utm_term=Featured+Deal+%235&utm_campaign=Lightning+Deals&utm_content=Lightning+Deals+12-15-15
Also available here:
http://www.midsouthshooterssupply.com/item/000622251600/NXG-APX-Airgun-Combo-4x15-Scope-With-Rings-point177-Caliber