DeepDiscount.com (a reliable online retailer) has some good games on sale for cheap and you can save even more when you use Google Shopping. Going on til the end of the month, use promo code JANSAVE20 at checkout for 20% (up to $20) off your order. Shipping is only $1.99 unless your order total is over $25, which will then nab you free shipping.
These games come out to AROUND $11, as topic title suggests, with tax and shipping tacked on when purchased individually. Prices shown below are without promo code and shipping added...
Gravity Rush 2 ($10.51)
Psychonauts And The Rhombus Of Ruin ($12.53)
Evil Within 2 ($9.99)
Firewall: Zero Hour ($12.51)
Dishonored 2 ($9.99)
Bridge Constructor Portal (10.80)
The Persistence ($12.75)
These are the most notable games I saw at first glance, but I'm sure y'all can find even better deals...
This Is The Police 2 X1 ($10.93)
We Happy Few - Deluxe Edition ($12)