The world's most famous stamp, according to Sotheby's in New York City, is expected to go for between $10 and $20 million, making it the most valuable object of its size in the world. See also: 10 Weirdest Things for Sale on eBay.
However, a rough guesstimate can range from 2-10 years to pay back the investment. However, one should be careful to note here that a typical wind turbine will last for 25+ years. However, one would hope that in those 25 years there are no major repairs that need to be done to the turbine.Also, one would hope that it lasts at least 50+ years, but naturally with this kind of lifespan there will be some repairs needed.owever, one would hope that in those 25 years there are no major repairs that need to be done to the turbine. Also, one would hope that it lasts at least 50+ years, but naturally with this kind of lifespan there will be some repairs needed.
Once you take away the cost of installation this typically works out at a profit of around Â£7,000. After the 20 year period you will no longer earn money from the Feed-in Tariff, however you will continue to generate your own electricity and in doing so save on your energy bills.6,750. As you can see from the table above, solar panels pay for themselves during their first 20 years and most average sized systems bring in a healthy return on investment. In fact, if you go for a 4kW system, the largest size for the highest FiT rate, you will see significantly more return on your investment.