I personally have owned a home with an above-ground and inground pool. I was not a pool person prior to buying these homes. Now I will not buy a home without a pool or at least have the option to go to a community pool (which means I would probably have to pay a montly HOA fee). I have also found that prior to opening the pool in the summer (which means taking off cover and adding chemicals) and closing pool (which means adding chemical, lowering the water and putting the cover back on) maintenance only consist of a 15 min. weekly chore of turning a knob backwards and adding 3 little bags of chemicals from Walmart (The bags cost 3.12 each).
Like other people I was hestitate about the maintenance and cost of a pool, but after having it I found it to be very easy to maintain. I advise all sellers to include a maintenance sheet and a yearly cost for chemical which typically run about 48.00 a year (unless you hire a pool company - which is very expensive). Also since this is not California your pool does not run all year...so you would barely notice a change in your electricity. Now far as water is concerned...you do not empty pools..so you are not refilling a huge pool every year, like some people think. That is what the chemicals are for. The only increase I had was about $5.00/annually.
One thing about home owners insurance...Having a pool does not cost more in insurance..but if you are purchasing a house w/ a pool or are installing one...pools are suppose to be a certain distance from the house, so please check with your counties guildelines. Pools should also have a deck w/ a gate or be fenced in. That is the only requirement that most insurance companies have.
Now far a marketing is concern...try to market your home when the weather is hot. Make sure the pool is open and nice and clear. Do include a maintenace schedule with your marketing materials , well as a ultility and water usuage. This will give potential buyers an idea of how to maintain a pool if they have never owned one. Happy swimming.