Not sure if I'm late to this party or not, but I figured I'd throw in some information based on my experiences.
I have two UPSs, a CyberPower PR750LCDRTXL2U that I got new in 2014 and an APC Smart-UPS SMT1500RM2U that I got used last year, the UPS itself was made in 2011.
I have no complaints...