Eureka Mighty Mite Canister Vacuum cleaner with extra clean bag for sale, ask for $30 (original $60)
I'm allergy to dust mite in the carpet. This vacuum cleaner is very helpful to clean carpet. It's in good condition. You will also get an extra clean bag.

https://www.amazon.com/Eureka-Mighty-Canister-Vacuum-3670G/dp/B00002N8CX/ref=sr_1_1?ie=UTF8&qid=1487485996&sr=8-1&keywords=eureka+vacuum+cleaner+3670