One area of concern initially for me is what the appraisal will be for the home. Even if a buyer is willing to pay for your extras, you may have difficulty getting the home to appraise. Understand that this has become more of an issue in the past couple of years than we have seen in the past. You may want to have an independent appraisal done on the home to see if selling the home still makes sense for you today.
Of course, some improvements will increase the value of your home over others. Such as finished basements, additional bath rooms, and extra living space. Today's buyers are looking for great deals. The fact that you have made the improvements may well give you an edge on selling the home versus others in the neighborhood, but at what price. Hopefully you have an expert agent working with you to maximize the potential value of the home. Even with the upgrades you still need to do the little things to sell the home. Have the home in perfect condition and be ready to move quickly. These are factors people will look for and be willing to invest a little more for immediate occupancy and not having to make repairs once they move in. Good pictures and a strong marketing plan will hopefully get you the exposure you need to maximize your return on your investment. Good luck with the decision, we are all pulling for you on this one.
I agree with most of the previous answers give in response to your very good question. But, on the comment made by one person, that we are in a declining market, I do not completely agree. There are price ranges that are still doing better than others and there are subdivisions doing better than others and there are styles of homes that are selling better that others. So... depending on what you have, where it is at and what improvements you made, you may or may not be able to recover some, all or most of you investment. The best suggestion I have is to get a professional Realtor, with a positive attitude, out to your home to give you a market analysis. That way you can make an educated decision as to whether you could, should sell, and at what price you should market your home at. Feel free to call me @ 309-275-4734. I have been marketing homes in the Bloomington Normal area for 25 years, and work with a team approach to selling Real Estate. I will be honest and straight forward with you. I would be happy to help you sell your home. If I can see the home, I can also let you know what you could do to make the home more attractive to the buyers that would be coming thru.
The only way to regain any of that is to market the home based on its upgrades that surrounding homes in the area do not have, and that doesn't always work out so well. Buyers today are more interested in the affordable home rather than the one with upgrades. If you purchased a home at an inflated price, getting that value alone could be very hard to do aside from upgrades to the home. Most of the time the return on upgrades is breaking even at best.