am3+ is not an APU.
copied from MaximumPC mag, Mar. 2014:
MSI 970A-G46
This board strikes a very good balance between cost and performance. It's about the cheapest you'll find that has heatsinks around the CPU tray, which you need to get a decent, stable OC. All six sata ports are rated for 6Gb/s, and it has several USB 3.0 ports on the back.
$80
www.msi.com
Only thing is I do not like MSI boards. This might turn out to be a good one for you?