Amazon has the Used GE Window and Door Alarm 4-Pack (White, 45174) for $12 at checkout. with free shipping on $35+ or with Prime. Features up to 120-decibel alarm or chime triggered by a high-quality magnetic sensor, or choose for a chime to sound when windows or doors are opened and closed.

Has excellent Amazon Reviews.

Amazon has the Champion Power Equipment 4,500W RV Ready Inverter Generator (201318) for $629 with free shipping. List price: $829. Features 61 dBA, carbon monoxide auto shutoff, 4500 starting watts & 3500 running watts, portable, cold start technology, CO Sensor.

Has excellent Amazon Reviews.

Amazon has the EGO Power+ 56V Cordless 21" Lawn Mower Kit w/ free 56V Battery (LM2135SP) for $700 with free shipping. List price: $999. Features multi-blade cutting system with 3 interchangeable blades: a mulching blade, high lift bagging blade, extended runtime blade, Touch Drive self-propelled technology, 7 different height settings from 1.5" to 4", LED headlights, up to 60 minutes of runtime per charge.

Has excellent Amazon Reviews.

Amazon has the Used Comfort Zone 9" Twin Window Fan (CZ319WT) for $16 at checkout. with free shipping on $35+ or with Prime. Features two speed fans, removable fabric cover, auto-locking expanders. #1 Best Seller in Household Window Fans.

Has good Amazon Reviews.

Amazon has the iSpring 3-Stage Whole House Water Filter System (WGB32BM) for $357 with free shipping. List price: $517. Features filters up to 100,000 gallons of water, removes up 99% of chlorine from water, reduces iron & manganese. The first stage sediment filter reaches 5 microns, while the second and third stage CTO Carbon Block filters use quality coconut shell carbon—tested by a third-party to meet NSF/ANSI standards.

Has excellent Amazon Reviews.