Serta Cyprus II Firm Mattress Set – Twin – 2pk

Amazon.com Price: $1,108.50 (as of 19/10/2017 04:43 PST- Details)

Solutions Memo Gel Mattress $1,632.00
Slumber Solutions Highloft Supreme 4-inch Memory Foam Mattress Topper, Size King Amazon.com Price: $85.50 (as of 18/10/2017 13:27 PST- Details)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.
Firm Memory Foam Mattress, Just Like Tempurpedic DeluxeBed Amazon.com Price: $612.76 (as of 19/10/2017 03:01 PST- Details)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.
935 Natural Flex Natural Latex Mattress $1,119.00
Greenco Premium Hypoallergenic Waterproof Mattress Protector - Vinyl Free (Twin) Amazon.com Price: $15.49 (as of 18/10/2017 12:55 PST- Details)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

Yes, a boxspring is included. It is a 2-percent Mattress set, 2 mattresses and 2 boxspring sets are included.
One or Two-Sided Mattress:
Two-sided, Simple-Turn Design – is helping prolong the lifetime of the Mattress.
Is a Mattress frame included:
No. Mattress frames are offered one by one.