Hi there. Most flippable mattresses these days are either ultra-luxury mattresses (and priced accordingly) or they feature different softness levels on each side of the mattress.

This latter design was created by online mattress makers in order to minimize returns from customers who aren't able to try the mattress before buying it. It is effective in minimizing returns, but can sometimes be a suboptimal design if you end up wanting to sleep on the firmer of the two sides.

The traditional flippable mattress design was designed to extend the life of the mattress and even out any body impressions that can occur over time. This design featured identical sleep surfaces on the top and the bottom, so that you can maintain the exact same comfort and support characteristics as you flip the mattress back and forth.

In the sub-$2,000 price range, there is one mattress that features this type of flippable design, which you can see here: https://www.goodbed.com/o/p/414378/

You can watch our review of this mattress here: https://www.goodbed.com/reviews/dlx-classic-review/

Discounts and other details are available here: https://www.goodbed.com/mattress-model/dlx-mattress-classic-12-medium/

I hope that's helpful.