I apologize for any confusion. We have been raising our prices every month for over a year now, and will raise them again this coming month. We try to keep our prices as low as possible without cutting corners. Unfortunately, prices are constantly increasing from our suppliers and it makes it difficult to be competitive and gauge what our costs are going to be month to month. We actually lose money on some models at the moment. Our price increase notice is not intended to mislead anyone.As for the Sleep Innovations mattress, they also sell those at Sam's Club at a lower price than they do on Amazon, I believe. However, it is not the same quality as ours. We have one of them in our R&D room here and the comfort level of that mattress is nowhere close to ours. Also, the cover on that mattress sounds like a diaper when you press your hand into it, and it smelled terrible when it was opened. This is lackluster design.We have put a lot of research (which is expensive) into our product, including durability tests, pressure mapping (it did better than Tempur-Pedic), toxicity (our mattresses are certified non-toxic), and we also guarantee them because we feel it is the best mattress we can sell.On the foundation, memory foam mattresses need more support than spring mattresses. It is important to have them on a proper surface so they perform well. Not all box springs are adequate and will cause any foam mattress to not feel right. You can choose to return the foundation under our return policy if you feel your box springs are adequate (Not sagging, not springy, & does not have spaces wider than 5" on the surface.)If you have any questions, please let me know. We want to ensure everyone has a good experience and more importantly, gets a good night's rest.