Moving my Unraid server on to a UPS has been on my to do list for well over a year... We tend to get one short power outage a month (lots of trees nearby) and I've been extremely fortunate enough to not suffer any data loss due the dirty shutdowns (I guess... at least as far as I can tell).
Finally got around to doing something about it at just the right time. A new line of APC UPS's are hitting the market right now and the previous models are getting marked down.
I picked up this unit for $125: https://www.bestbuy.com/site/apc-back-ups-xs-1300va-tower-ups-black/9307797.p?skuId=9307797
In store it is $150, but they price matched the website. MSRP is $180, Amazon has it for $150, Best Buy has it for $124.
There are several other units on clearance at Best Buy as well, this is just the one I landed on. I've got Unraid set to power down after 2 minutes but the UPS will keep our internet/wifi online for about 90 minutes.